ECSS Software Process Model Implementation Examples

ECSS Software Process Model

Implementation Examples

SD-MA-AI-0006, Issue 4

APPENDIX A

SatellitesSoftware Process

Satellite SoftwareProducts

Life Cycle Processes

Ground SoftwareProcesses

ECSS Software Process Model Implementation Examples

SatelliteSpace Segment Software

System Processes

Independent SoftwareV & V

ImplementationSamples

A-1A-2

Satellites Software Processes

TheSystem SW PrimaryLife Cycle Process

The System SoftwareSupporting Process

The System SoftwareOrganisational

Processes






System Processes

A-1

External References

In Triggers (IT) Out Triggers (OT) External Inputs (EI) External Outputs (EO)

SatelliteSoftware System

Life-cycle Process

SS-100

Parent: Satellite SW Life Cycle ProcessesPerspective: ALL Activity Satellite Software Processes Diagram: IMP-SS-000

Space Segment Requirements

Space Segment Constraints

ECSS SW Artifacts

Software Products Life-cycle Processes

SS-200

Software Products Life-cycle Processes

SS-200SW Products Requirements

ECSS SW Artifacts

Software Product Releases

SatelliteSoftware IV&V

Process

SS-300


SW Products Requirements

Verified ECSS SW Artifacts

Independently

Determined Process & Software Problems

Satellites Software Processes I


SW Products Artifacts

Qualified Satellite SW

CUSTOMER / SATELLITE SUPPLIER

SATELLITE SUPPLIER SW IV&V SUPPLIER

SATELLITE SUPPLIERSW SUPPLIERS


Independently Determined Process

& Software Problems

External References



Primary Life Cycle Processes

SS-110

Parent: Satellite Software ProcessesPerspective: ALL Activity: Satellite Software System LC Process Diagram: IMP-SS-100


Space Segment

Constraints

ECSS SW Artifacts

Satellites Software - Software System Life Cycle Processes I



Supporting Life Cycle Processes

SS-120


Organizational Life Cycle Processes

SS-130



& Software Problems

Qualified Satellite SW




T

T

T

Independently Determined

Process & Software Problems

External References


Parent: Satellite SW System LC ProcessesPerspective: ALL Activity: SW System Primary LC Process Diagram: IMP-SS-110

Satellites Software System Primary Life Cycle Processes I

Satellite SystemSupply Processes

IMP-SS-112 [PLC-2 / T]

Satellite SystemSupply Processes


Satellite SystemAcquisition Process


Satellite Software Maintenance and

MigrationIMP-SS-115 [PLC-5]

Maintenance Plan

Change Justification

File

SatelliteSoftware Operations Engineering Process

IMP-SS-113 [PLC-3] Operational Plan

Operational Requirements

Maintenabilty Requirements

SATELLITE SUPPLIER

CUSTOMER

SATELLITE SUPPLIER

SATELLITE SUPPLIEROPERATORCUSTOMER

SATELLITE SUPPLIERSATELLITE SW MAINTAINER

ITT/RFQ

Negotiated SATELLITE

Contract

Proposal

DJF, DDF, TS, RB, IRD, ICD

Space Segment Reusable

Facilities & DBs


Facilities & DBs




Space Segment

Reusable

Facilities & DBs

Satellite System Software Engineering Process


External References

Parent: SW System Primary LC ProcessPerspective: Software Engineering Activity: Satellite Acquisition Process Diagram: IMP-SS-111

Satellites System Acquisition Process I

Request for Proposal or ITT submission to

Satellite supplier(s)

IMP-SS-111.2 [AP-2 / T]

Satellite SystemRequest for Proposal (or ITT) preparation

IMP-SS-111.1 [AP-1 / T

Contract Negotiation

IMP-SS-111.4 [AP-4 / T]

Initiation

ECSS-M-series

Submitted proposals evaluation and selection

IMP-SS-111.3 [AP-3 / T]

Selected proposal

Negotiated ContractITT/RFQ

ITT/RFQ

SATELLITE SUPPLIER / CUSTOMER

CUSTOMER CUSTOMER CUSTOMER

EO-01

EI-01 EO-02

In Triggers (IT) Out Triggers (OT) External Inputs (EI)EI-01: Supply Process: Proposal preparation and submission

External Outputs (EO)EO-01: Supply Process: Review of the proposalEO-02: Supply Process: Negotiation of the contract

Assess Needsfor Special SWProvisions and

SW Reuse

Process Requestsfor Clarification

on SW Req.s

Request forClarification

on Proposal(s)

Space Segment Requirements &

Constraints

Satellites Software System Supply Processes I

Proposal Preparation and submission

IMP-SS-112.2 [SUP-2 / T]

Parent: SW System Primary LC Process Perspective: Software Engineering Activity: SATELLITE Supply ProcessDiagram: IMP-SS-112

External References:

In Triggers (IT) Out Triggers (OT)OT-01: Acquisition Process @SW Products LC

Processes

External Inputs (EI)EI-01: Acq.n Proc.: Proposal prep.n & submissionEI-02: Acq.n Proc.: Submitted proposal selectionEI-03: Reusable SW Data / InformationEI-04: Software Suppliers Proposal(s)

External Outputs (EO)EO-01: Acquisition Process: Submitted proposal evaluation and selection

Review of the proposal request

IMP-SS-112.1 [SUP-1 / T]

Negotiation of the contract

IMP-SS-112.3 [SUP-3/T]ITT/RFQ

ECSS-Mseries

SATELLITE SUPPLIER

SATELLITE SUPPLIER

Negotiated Contract

SATELLITE SUPPLIER /CUSTOMER

EI-01EI-02

EO-01

RequestClarifications to

Customer

Integrate SWSuppliersProposals

OT-01: RFQ/ITTs to

Suppliers of SW Products &

to SW IV&V Supplier

EI-03

EI-04

Activity: Satellite SW Systems Engineering ProcessDiagram: IMP-SS-114

Satellites Software System Engineerring Process I

Parent: SW System Primary LC Process Perspective: Software Engineering

Negotiated Customer

Requirements



Satellite Software System Requirements Engineering

Process

IMP-SS-114.1 [SEP-1/T]

Satellite Software Interface Management


Hardware Environment

Interface Management Procedures

Design Justification

File

ECSS-M-30 Project

Requirements

Satellites Software Project Phasing and Planning

IMP-SS-114.4 [SEP-4 /T]LC Requirements

for the SW Products

ECSS-M-40 Requirements

Satellite Software & Data Technical Budget and Margin Management


HW Environment

DJF: Technical budgets status and margin

SATELLITE SUPPLIERCUSTOMER

SATELLITE SUPPLIERSATELLITE SUPPLIER

SATELLITE SUPPLIER


SW Products I/F Requirements

SW Products Budget

Requirements

System DDF, DJF, TS, RB, IRD, ICD

Released SW Products

Satellites Software System Integration & Qualification

IMP-SS-114.3 [SEP-3 /T] Qualified SW System

Configuration

SATELLITE SUPPLIER


Activity: Satellite SW System Requirements Engi.ngDiagram: IMP-SS-114.1

Satellites Software System Requirements Engineering Process

Overall System

Requirements

RB (inputs to)IRD (inputs to)

RB (System Partitioning with definition of items; System Configuration list)

IRD (SW/HW Interface Requirements)DJF (Traceability to system partitioning)

Parent: Satellite SW System Engineering Process Perspective: Software Engineering



System Level Rqmts for SW Verification

and Validation IMP-SS-114.1.3

[SE –3 /T]

SystemSRR

System Requirements

Analysis IMP-SS-114.1.1

[SE –1 /T]

System Partitioning

IMP-SS-114.1.2[SE-2 /T]

System Level Integration of

SoftwareIMP-SS-114.1.4

[SE –4 /T]

SRR Data PackageRB, IRD

DJF


Reviewed SRR Data Package

RB, IRDDJF

I

SATELLITE SUPPLIER:System Engineering

RB: V&V ProcessRequirements

On-board SoftwareTest Planning &Test FacilitiesRequirements

T

On-board SoftwareRequirements Analysis

T

Replaceability, Patchability,

Reconfigurability,Re-programming

(In-flight and at Launch Site) Requirements

Integrated HW-SW

Test Requirements

SW SRRs

SATELLITE SUPPLIER:System Engineering

SATELLITE SUPPLIER:System Engineering,

SW System Verification Engineering


System SW Engineering

Satellites System Requirements Analysis

RB: Functions & Performance

RqmtsIRD: Interface

Rqmts

Parent: Satellite Software System Requirement EngineeringPerspective: Software Engineering Activity: Satellite System Requirements Analysis Diagram: IMP-SS-

114.1.1



Definition of system functionalities and

interfacesIMP-SS-114.1.1.1

[SYS-1 /T]

Overall system reqmts

Operations and Maintenance

Requirements DefinitionIMP-SS-114.1.1.2

[SYS-2 / T]

V&V Rqmts and Design Constraints Definition

IMP-SS-114.1.1.3 [SYS-3 / T]

System Criticality/ Critical Functions

DefinitionIMP-SS-114.1.1.4

[SYS-4 / T] RB:- Safety & Reliability Rqmts- Critical functions

identification

RB: Design ConstraintsV&V requirements

- SW Eng. Standards

RB: Operations and Maintenance requirement


I

Satellite Special Requirements Definition

114.1.1.5 (T) RB: (any special requirements concerning for instance on-board re-programmability, on-board checkout, failure tolerance,

Operating System commonality, SW Development Environment, Development Language(s), etc.)

Provision ofSpecific Requirements

for SW IV&V

T

SATELLITE SUPPLIER:

System PA & RAMS

SATELLITE SUPPLIER:

System SW Ver. Eng..



For all Tasks


Parent: Satellite Software System Requirement EngineeringPerspective: Software Engineering Activity: Satellite System PartitioningDiagram: IMP-SS-114.1.2



I

Definition of the System Physical Architecture &

Design IMP-SS-114.1.2.1

Definition of the System Modes &

Transitions

IMP-SS-114.1.2.2

Definition of the System Command & Monitoring Design

IMP-SS-114.1.2.3

Definition of the System FDIR &

On-board Checkout Design

IMP-SS-114.1.2.4

Selection of thecandidate On-boardComputer Target(s)

IMP-SS-114.1.2.5

Definition of the System Level SW

Architecture

IMP-SS-114.1.2.6

HW-SW Interaction Analyses

Identify the Developmental

SW CIs

IMP-SS-114.1.2.7

Overall System Req.s

SW System Input t o:

RB, IRD, DJF

SW CI-listSelection of the

On-boardComputer Target(s)

and OS IMP-SS-114.1.2.8

Re-UseAnalyses

[Re-use Process]

Satellite Functional Design Integration

IMP-SS-114.1.2.6



Same roles for all Tasks


Parent: Satellite Software System Requirement EngineeringPerspective: Software Engineering Activity: System Level Rqmts for SW Verification and Validation

Diagram: IMP-SS-114.1.3



I

Overall System Req.s

Assess System Model s Philosophy

IMP-SS-114.1.3.1

Analyze Needs of Integrated HW-SW

Components

IMP-SS-114.1.3.2

Analyze Needs ofInterfacing Software

CIs

IMP-SS-114.1.3.3

Analyze Needs ofSatellite Flight and Additional Models

IMP-SS-114.1.3.4

Define the Satellite SW Versioning &

Release Policy

IMP-SS-114.1.3.5

Assess SW Testing Needs for Simulators

and Breadboards IMP-SS-114.1.3.6

Analyze the System needs for the SVF

IMP-SS-114.1.3.7

Inputs to RB


System SW Engineering,System Verification Eng..

System SW V&V Eng..

Same roles for all Tasks

Satellites System level Integration of Software

IRD: System level integration support

requirements, product preparation requirements

RB: System level data interfaces, development constraints

RB: SW Observability Requirements

IRD: System level interface requirements

Parent: Software System Requirements Engineering

Perspective: Software Engineering Activity: System level integration of Software Diagram: IMP-SS-114.1.4



SW additional Requirements Definition

IMP-SS-114.1.4.1[SLI-1 / T]

Definition of Customer Products provision to

supplierIMP-SS-114.1.4.3

[SLI-3 / T]

Interface Data Medium Definition and

Development constraintsIMP-SS-1164.1.4.2

[SLI-2 / T]

System level Requirements

Simulators or Breadboards Plans & Data

IF SW products integrated in

system


I



System SW Engineering,


System SW Engineering,

ISatellites Software System Project Phasing and Planning

Elements of Satellite

Maintenance Plan

Requirements Baseline at SRRDocumentation Standards

Design StandardsVerification and Validation

Standards

Software Project Development

Plan

Parent: Satellite SW System Engineering Process Perspective: Software Engineering Activity: Project Phasing and PlanningDiagram: IMP-SS-114.4


In Triggers (IT) Out Triggers (OT) External Inputs (EI)EI1: SW PA Plan ReviewEI2: SW PA Procedures & Standards ReviewEI3: SW PA Life Cycle Review

External Outputs (EO)

Requirements Baseline at SRRSoftware System Development Plan

Software SystemLife Cycle Definition

& Planning

IMP-SS-1114.4.1[SLC-1 / T]

Documentation/Inputs-Output Process

definition for each Phase and Milestone

IMP-SS-114.4.3[SLC-3 / T]

SRRSystem vs. Software Requirements

Requirements BaselineSW System

Development Planning Information

Tailoring of ECSS SW Engineering

Standards & ModelIMP-SS-114.4.2

[SLC-2 / T] Requirements BaselineSW System

Development PlanningInformation

Software System Development Plan

Review

E11

EI2

EI3

Definition of specific

Methodologies & Complementary

StandardsIMP-SS-114.4.5/T

Specific Methodologiesand complementary

Standards(e.g., RT SW, Testing, etc.)

SATELLITE SUPPLIER

SATELLITE SUPPLIER

SATELLITE SUPPLIER

SATELLITE SUPPLIER

Software Re-usePlanning

T

ISatellite Software System Interface Management

Interface Management Procedures,

Part of configuration Management planECSS-M-40

Requirements

Parent: Satellite SW System Engineering Process

Perspective: Software Management Activity: Interface ManagementDiagram: IMP-SS-114.5



Definition of Satellite Interface Management

ProceduresIMP-SS-114.5.1

[IM-1 / T]


SRR Data Package

Requirements Baseline

Define specific Procedures for the Satellite DB, TM/TC Data,

and Test DBCustomer Requirements on Space vs. Ground Segment

Interfaces

ISatellite System Data Technical Budget and Margin Management

Technical Budgets and Margin Philosophy

Parent: Satellite SW System Engineering Process Perspective: Software Management



Definition of Margin Philosophy

IMP-SS-114.6.1[IM-2 / T ]

Budget StatusDetermination

IMP-SS-114-6-2[IM-3 / T]

CUSTOMERSATELLITE SUPPLIER

SATELLITE SUPPLIER

HW environment Characteristics & Resource Data

Requirements Baseline:SRR Data Package

DJF: Technical budgets status and

margins

PDR, CDR, QR, AR

Assess Computer Target ResourceCapabilities against

the estimated (or measured)Satellite SW Resource Requirements

Software Supplier(s) Input Data

Activity: Technical Budget & Margin ManagementDiagram: IMP-SS-114.6

Assess Suitability ofReusable Software

Software Supplier(s) Input Data

ISatellite Software System Integration & Qualification Process


Parent: Satellite SW System Engineering ProcessPerspective: Software Engineering Activity:Sat. SW System Integration & QualificationDiagram: IMP-SS-114.3


Released SWProducts

Satellites Software System Integration

IMP-SS-114.3.2Integrated

System SW Configuration(s)

Satellites Software System Testing

IMP-SS-114.3.3Tested System

SWConfiguration

Validated SW

Products

Satellite System AIV/AIT

IMP-SS-114.3.4

SATELLITE SUPPLIER:System Verification Eng..

Qualified SWSystem

Configuration

Satellites Software System Integration & Test

Definition

IMP-SS-114.3.1System SW

Integration & Test ProceduresReleased SW Products

System DDF, DJF, TS,

RB, IRD, ICD

System SW Test

Procedures

System Test Procedures

Integrated System SW

Configuration(s)

System SW Integration Procedures

SATELLITE SUPPLIER:SW System Engineering

& Verification EngineeringSATELLITE SUPPLIER:SW System Verification

Engineering


& Verification Engineering

ISatellite Software System Integration & Test Definition Process


Parent: Satellite Software System Integration & QualificationPerspective: Software Engineering Activity:Sat. SW System Integ./Test DefinitionDiagram: IMP-SS-114.3.1


Released SWProducts

Satellites Software System Integration & Test

Definition

IMP-SS-114.3.1.1System SW

Integration & Test Procedures

System PDR Documentation

SW Products CDR Documentation

Satellites System SVFPreparation & Setup

IMP-SS-114.3.1.2

SATELLITE SUPPLIER

Satellites SW SystemTest-bed Setup

IMP-SS-114.3.1.3

System SWTest DB

Preparation

System CDR Documentation

SW Products QR Documentation

Nonconformances / SPRs on SW Products


Verify System SWTestbed Readiness

& Setup

System SW Integration & Test

Specifications





ISatellite Software System Integration Process


Parent: Satellite Software System Integration & QualificationPerspective: Software Engineering Activity:Satellite SW System Integration Diagram: IMP-SS-114.3.2


Satellites Software System Integration on the SVF

IMP-SS-114.3.2.1

IntegratedSystem SW

Configuration

System SW Integration Procedures Satellites Software System

Integration Testing on the SVF

IMP-SS-114.3.2.2

SW SystemIntegration Readiness

Review





Verify SW SystemIntegrationNonconformances /

SPRs on SW ProductsNonconformances /

SPRs on SW Products





ISatellite Software System Testing Process


Parent: Satellite Software System Integration & QualificationPerspective: Software Engineering Activity:Satellite SW System TestingDiagram: IMP-SS-114.3.1


Satellites Software System Testing on the SVF

IMP-SS-114.3.2.1

TestedSystem SW Configuration

(to System QR Data Package)System SW Test

Procedures Preparation of System SW Configuration for System

AIV/AIT

IMP-SS-114.3.2.2

SW SystemTest Readiness

Review



Updated System CDR Documentation

updated SW Products QR Documentation



SW SystemTest ReadinessReview Board

Verify SW SystemTesting and achieved

Coverage

Verify SW SystemDelivery

Configuration





ISatellite Software System Supporting Processes

Parent: Software System Life Cycle ProcessesPerspective: ALL

Activity: Supporting Life Cycle Processes Diagram: SS-IMP-120



SW Documentation ProcessIMP-SS-121

SLC-1

SW Product AssuranceIMP-SS-124

SLC-4

Problem Resolution ProcessIMP-SS-123

SLC-3

Joint Review ProcessIMP-SS-126

SLC-6

Audit ProcessIMP-SS-127

SLC-7

Software Configuration Management

Plan

Software Configuration Management Process

IMP-SS-125SLC-5



Project Plans

Technical Review Reports

Audit Plan and Report

Available Documentation

SW Development plan

M-50 reqs

SATELLITE SUPPLIER / CUSTOMER

SW PA Reports

SW docs & standards

SATELLITE SUPPLIER

SATELLITE SUPPLIER

SATELLITE SUPPLIER


Verification Process

SLC-2

Traceability matrix, Verification reports

Verification plan

RB, TS, Interface

Requirements

Validation against RB Process

SLC-8

Validation reportsValidation planRB, Interface

Requirements

Identified problem

Verified SW Documentation

SATELLITE SUPPLIER

SATELLITE SUPPLIER

ISatellite Software System Organizational Processes

Parent: Software System Life Cycle Processes Perspective: ALL Activity: Organizational Life Cycle Processes Diagram: IMP-SS-130

External References: ECSS-E-40 sec.


Infrastructure ProcessIMP-SS-133

OLC-3

Training ProcessIMP-SS-132

OLC-2

Software System Management Process

IMP-SS-131OLC-1

SW System Life Cycle Improvement Process

IMP-SS-134OLC-4

SATELLITE UPPLIER/SW SUPPLIERS/

SW IV&V SUPPLIERCUSTOMER

Historical data

SW Life Cycle in the organization

Proposal for Process improvement

(I.e. technology adv.)

Process assessment procedure and records

Records of Training/Experience

WBS

Constraints Reqs

(Contract)

Customer Reqs

Constraints Reqs

(Contract)

Customer Reqs

Records of Training

/Experience

Residual Risk Accepted

Schedule reports

SW Project Development

plan

Configured Environment


SATELLITE SUPPLIER

SATELLITE SUPPLIER


Software ProductsPrimary Life Cycle Processes

Software ProductsSupporting Life Cycle Processes

Software ProductsOrganizational Life Cycle

Processes

SatelliteSoftware Processes



System Processes



External References


Software ProductsPrimary Life Cycle

Processes

SS-210

Software ProductsPrimary Life Cycle

Processes

SS-210

Parent Satellite SW Life Cycle ProcessesPerspective: ALL Activity:Software Products LC Process Diagram: IMP-SS-200



ECSS Validated SW Artifacts

Satellite Software - Software Products Life Cycle Processes I

SW Products Releases

Software ProductsSupporting Life Cycle

Processes

SS-220

Software ProductsSupporting Life Cycle

Processes

SS-220


Processes

SS-230


Processes

SS-230

T

SW Products Primary Life Cycle Processes

SW ProductsSupply Process

IMP-SS-112[PLC-2 / T]

SW ProductsSupply Process


Software Products Development Process

IMP-SS-213[PLC-4 /T]

Software Products Development Process

IMP-SS-213[PLC-4 /T]

Parent: Software Products Life-Cycle ProcessesPerspective: Software Engineering Activity: SW Products Primary Life Cycle Processes Diagram: IMP-SS-210



SW ProductsAcquisition Process


SW SUPPLIERS

SATELLITE SUPPLIER


ITT/RFQ

Needs Negotiated Contract

Proposal


I

ISoftware Products Development Process

Technical Specification, Interface Control

Document, Design Justification File

Technical Specification, Interface Control

Document, Design Justification File

Parent: SW Products Primary Life Cycle ProcessesPerspective: Software EngineeringActivity: Software Product Development Process

Diiagram: IMP-SS-213



Software Requirement Engineering Process

IMP-SS-213.1[SEP-2 / T]

Software Design Engineering Process

IMP-SS-213.3[SEP-3 / T]

Design Definition File

Requirements Baseline, Interface Requirements

Document, design Justification File Interface Management

IMP-SS-213.5[SEP-5 / T]




File

ECSS-M-30 Project

Requirements

Project Phasing and Planning

IMP-SS-213.4[SEP-4 / T]



Technical Budget and Margin Management

IMP-SS-213.6[SEP-6 / T]

HW Environment


SATELLITE SUPPLIERSW SUPPLIER

SW SUPPLIER

SW SUPPLIERS

SW SUPPLIER

SATELLITE SUPPLIER SW SUPPLIER

IProject Phasing and Planning

Elements of SW Maintenance Plan



Standards


Plan

Parent: Software Product Development Process Perspective: Software Engineering Activity: Project Phasing and PlanningDiagram: IMP-SS-213.4




Requirements Baseline at SRRSoftware Project Development Plan

(Life cycle, tools and methods definition)

Software Life Cycle Definition

(milestones, reviews and maintenance

planning)IMP-SS-213.4.1

[SLC-1 / T]

Documentation Input/ Output Process

definition for each phase and Milestone

IMP-SS213.4.3[SLC-3 / T]

SRR

SW SUPPLIER: Project Manager

ProjectRequirements

Requirements BaselineSW Project

Development Plan

SW SUPPLIER: Project Manager, SW Engineering, SW PA, SW CM

Product Level Tailoring of ECSS

SW Standards

IMP-SS-213.4.2 [SLC-2 / T ]

Requirements BaselineSW Project

Development Plan

SW SUPPLIER: Project Manager, SW PA, SW CM, SW Engineering

Software Project Development Plan

Review

EI1

EI2

EI3

Specific Required Methodologies

and complementary Standards

ITechnical Budget and Margin Management

Technical budgets and margin philosophy

Parent: Software Product Development Process

Perspective: Software ManagementActivity: Technical Budget & Margin Management

Diagram: IMP-SS-213.6



Definition of margin philosophy

IMP-SS-213.6.1[IM-2 / T]

Budget Status Determination

IMP-SS-213.6.2IM-3

SW SUPPLIER: SW Engineering

HW environment

Requirements Baseline:SRR Data Package

DJF: Technical budgets status and

margins

PDR, CDR, QR, AR

SATELLITE SUPPLIER

ISW Requirements Engineering Process

Activity: SW Requirements Engineering Process Diagram: IMP-SS-213.1

Functional and Capability

Specification



Parent: Software Product Development Process Perspective: Software Engineering

In Triggers (IT) Out Triggers (OT) External Inputs (EI)EI1: SW PA Requirements (diag. 26)


Software Top Level Architectural Design

IMP-SS-213.1.2[R-2 / T]

Software Requirements AnalysisIMP-SS-213.1.1

[R-1 / T]

SW SUPPLIE: SW Engineering, SW PA, Safety

SRR Docs:IRDRB

EI1

Preliminary DesignReview

DeliveredPDR DP

ReviewedPDR DP

PDR Data PackagePDR Report

Product Reliability Analysis

System Level Functional Analysis

SW RAMS Analysis

Higher Level Safety Plan

ISW Requirements Analysis

Preliminary Functional and

Capability Specification

Interface Control Document (external

interfaces)SW SUPPLIER:SW Engineering


Parent: SW Requirements Engineering ProcessPerspective: Software Engineering

Verify Software RequirementsDocumentsE-40 sec. 5.4.2.3

Activity: SW Requirements AnalysisDiagram: IMP-SS-213.1.1

In Triggers (IT) Out Triggers (OT) External Inputs (EI)EI1: SW PA Requirements

External Outputs (EO)EO1. Test case spec & procs

SRR Docs:IRDRB Delivered

Baseline


Specification

EO1

External Interfaces identificationIMP-SS-213.1.1.2

RA-2

Preliminary Requirements Establishment

IMP-SS-213.1.1.1[RA-1 / T]

SW SUPPLIER:SW Engineering

EI1

SupportingSW Prototyping

for RequirementsAnalysis

ISW Top-Level Architectural Design


Specification

EO1

IRD

Preliminary PDR Data Package

RB

RB

Preliminary ICD

SW Top level

Architecture

Preliminary SW

Integration test plan

Preliminary Operation manual


Definition of Preliminary Test

Requirements and Plan for SW Integration

IMP-SS.213.2.1.4AD-4


Parent: Software Requirement Engineering Process Perspective: Software Engineering

ArchitecturalDesign

DefinitionIMP-SS-213.1.2.1

[AD-1 / T]

Verify Software Design

Activity: SW Top-Level Architectural Design Diagram: IMP-SS-213.1.2

In Triggers (IT) Out Triggers (OT) External Inputs (EI) External Outputs (EO)1. Integration SW/SW

SoftwareRequirements

Document

Preliminary(Top Level )

Interface DesignIMP-SS-213.2.1.2

[AD-2 / T]

Preliminary Operation Manual Definition

IMP-SS-213.1.2.3[AD-3 / T]



Numerical Error Report


PDR Data PackageSupporting

SW Prototyping &Design Trade-offs

ISW Design Engineering Process

Code,Unit tests

DocumentationSW SUPPLIER:SW Engineering


Parent: Software Product Development Process Perspective: Software Engineering Activity: SW Design Engineering Process Diagram: IMP-SS-213.3


Coding and Testing

IMP-SS-213.3.2[SD-2 / T]


Design of Software Items

IMP-SS-213.3.1[SD-1 / T]

Integration

IMP-SS_213.3.3[SD-3 / T]

SW SUPPLIER:SW EngineeringSoftware

ArchitecturalDesign

Document

Detailed design DP

Numerical Error Report

SW Validationagainst the TS

IMP-SS-213.3.4[SD-4 / T]

Critical DesignReview

DeliveredCDR Data

PackageReviewedCDR Data Package

CDR ReportCDR Data

Package

InspectionQ-80 sec. 3.2.5k

Design Complexity & Modularity

Measurement

Safety Analysis

Critical Module Handling


IDesign of SW Items

Detailed design DP

DeliveredDetailed

Design Data Package

Detailed Design

document

SW Integration Test Plan

SW Unit Test Plan

ICD

Operation Manual Update

Update of Test Requirements and Plan

for SW IntegrationIMP-SS-213.3.1.5

[SDI-5 / T]


Parent: Software Design Engineering ProcessPerspective: Software Engineering

Verify Software Design

Activity: Design of SW ItemsDiagram: IMP-SS-213.3.1

In Triggers (IT) Out Triggers (OT) External Inputs (EI)1. Coding and Testing.Unit Test Execution


SoftwareArchitectural

DesignDocument

Detailed Interface Design (external)

IMP-SS-213.3.1.2[SDI-2 / T]


IMP-SS-213.3.1.3[SDI-3 / T]

SW Unit Test Planning

IMP-SS-213.3.1.4[SDI-4 / *

EI1Detailed Design

Definition IMP-SS-213.3.1.1

[SDI-1 / T]





SW SUPPLIER

ICoding and Testing

EO1

Code,Unit tests

Documentation

SW Code

Unit Test Plan

modify

Unit Testing feedback

SW Integration Test Plan

SW Unit Test Report


Update of Test Requirements and Plan

for SW Integration IMP-SS-213.3.2.5

[SC-5 / T]



Verify Software Code

Activity: Coding and TestingDiagram: IMP-SS-213.3.2

In Triggers (IT) Out Triggers (OT) External Inputs (EI) External Outputs (EO)1. Design of SW Item.SW Component Design Document

Detailed Design

DeliveredCode & Unit

tests

Unit Test Procedures and Data Definition

IMP-SS-213.3.2.2[SC-2 / T]


IMP-SS-213.3.2.4[SC-4 / T]

SW Unit Testing

IMP-SS-213.3.2.3[SC-3 / T]

EO1 SW Unit Coding

IMP-SS-213.3.2.1[SC-1 / T]

Review & Check Coverage






IIntegration

EI2

SW CodeUnit test

documentation

EI1

SW Integration Test Report

SW Validation Testing specification


Validation test case and procedure

definitionIMP-SS-213.3.3.3

[IN-3 / T]



Verify Software Integration

Activity: IntegrationDiagram: IMP-SS-213.3.3

In Triggers (IT)1. Qualification.Validation Plan Def.

Out Triggers (OT) External Inputs (EI)1. SW Req. Analysis.SW Requirements Document2. SW Top Level Srch. Design.Architectural Design


SW/SW Integration

IMP-SS-213.3.3.1[IN-1 / T]

Operation Manual UpdateIMP-SS-213.3.3.2

[IN- / T]

IT1Check Coverage

SW SUPPLIER:SW Eng. & SW Ver. Eng.

SW SUPPLIER:SW Eng. & SW Ver. Eng, SW PA.

SW SUPPLIER:SW Eng. & SW Ver. Eng.

I

SW design and test

evaluation report

Validation Plan,Validation Reqs

Validation testing reports,Non conformance reports,

Problem reports,Validated Software

SW Product,Validation

Environment (HW/SW)

SW Validation Test Spec.n

Parent:Software Design Engineering ProcessPerspective: Verification & Validation Engineering Activity: SW Validation against TSDiagram: IMP-SS-213.3.4

External References: ECSS-E-40 sec. 5.5.xx , ECSS-Q-80 sec. 3.3.4q, 3.3.4g, 3.3.4r


Software Validation Testing Specification

DefinitionVI-1

Update and prepare the deliverables SW

productVI-5

Evaluate the design, code, test and

operation manualVI-4

Validation testingagainst the TS

VI-2

Update the operation manual

VI-3

SW on delivery media,SW release doc.,

Baseline deliverables

Operation manual (update)

Test Readiness Review

Test Readiness Review Board

Verify test

Analysis and InspectionVI-6

CDR Data

Package

Analysis and Inspection reports

SW Specification

SW Design/Code

CheckCoverage


SW SUPPLIER:SW Verification Eng..


SW SUPPLIER: SW Eng..

SW SUPPLIER: SW Eng.., SW Ver. Eng..

SW SUPPLIER: SW PA, SW Eng.., SW Ver. Eng..

SW Product Validation against the Technical Specification

ISW Product Supporting Life Cycle Processes

Parent: Software Product Life Cycle ProcessesPerspective: ALL

Activity: Supporting Life Cycle Processes Diagram: SS-IMP-200



SW Documentation ProcessIMP-SS-221

SLC-1

SW Product AssuranceIMP-SS-224

SLC-4

Problem Resolution ProcessIMP-SS-223

SLC-3

Joint Review ProcessIMP-SS-226

SLC-6

Audit ProcessIMP-SS-227

SLC-7

Software Configuration Management

Plan

Software Configuration Management Process

IMP-SS-225SLC-5


SATELLITE SUPPLIERSW SUPPLIER

CUSTOMER

Project PlansTechnical

Review Reports

Audit Plan and Report

Available Documentation

SW Development plan

M-50 reqs

SW SUPPLIER / SATELLITE SUPPLIER

SW SUPPLIER

SW PA Reports

SW docs & standards

SW SUPPLIER

SW SUPPLIER

SW SUPPLIER


SW SUPPLIER


SLC-2

Traceability matrix, Verification reports

Verification plan

Validation against RB Process

SLC-8Validation plan

RB, Interface Requirements

SW SUPPLIER

RB, TS, Interface

Requirements

Identified problem

Verified SW Documentation

ISW Product Organizational g Life Cycle Processes

Parent: Software Product Life Cycle Processes Perspective: ALL Activity: Organizational Life Cycle Processes DIAGRAM: IMP-SS-230

External References: ECSS-E-40 sec.


Infrastructure ProcessIMP-SS-233

OLC-3

Training ProcessIMP-SS-232

OLC-2

Software System Management Process

IMP-SS-231OLC-1

SW System Life Cycle Improvement Process

IMP-SS-234OLC-4

SATELLITE UPPLIER/SW SUPPLIERS/

SW IV&V SUPPLIERCUSTOMER

Historical data

SW Life Cycle in the organization

Proposal for Process improvement

(I.e. technology adv.)

Process assessment procedure and records

Records of Training/Experience

WBS

Constraints Reqs

(Contract)

Customer Reqs

Constraints Reqs

(Contract)

Customer Reqs

Records of Training

/Experience

Residual Risk Accepted

Schedule reports

SW Project Development

plan

Configured Environment


SW SUPPLIER

SW SUPPLIER


Independent V&V ofSoftware Products

SW IV&V Support toJoint

Review Process





System Processes


Activity:SW IV&V ProcessDiagram: IMP-SS-300.0

External References


Parent:Satellite SW Lice Cycle ProcessesPerspective: Software Engineering

Satetllite Software - Software Products Life Cycle Processes I


Independently Verified ECSS SW

Artifacts


& Software Problems



Independent V&V ofSoftware Products

IMP-SS-310

SW IV&V Support to JointReview Process

IMP-SS-320

Specific SW IV&V Requirements

SW SUPPLIERSSW IV&V SUPPLIER

SATELLITE SUPPLIERSW IV&V SUPPLIER

SATELLITE SUPPLIERSW IV&V SUPPLIER

SW SUPPLIERS

ISatellite SW Independent Verification and Validation Processes

Parent: Supporting Life Cycle ProcessesPerspective: Verification and Validation EngineeringActivity: IV&V of SW Products

Diagram IMP-SS-310



IndependentVerification Process

ImplementationIMP-SS-311

[VP-1 / T]Independent


IMP-SS-312[VP-2 / T]

SW IV&V SUPPLIER

Technical Specifications, Design Definition Files, Design Justification Files

IndependentValidation Process

ImplementationIMP-SS-313[VLP-1 / T]

Independent Validation Process

of the SW ProductsIMP-SS-314[VLP-2 / T]Technical Specifications,

Design Definition Files, Design Justification Files

Specific SW IV&V Requirements




Independently Verified ECSS SW

Artifacts


& Software Problems

SW IV&V SUPPLIER

SW IV&V SUPPLIER

SW IV&V SUPPLIER

ISatellite Independent SW Verification Process Implementation

Satellite SW System PDRData Package

IndependentVerification

plan: methods & tools

IndependentVerification plan:

criticality and effort

IndependentVerification plan:

project organization

Parent: IV&V of SW ProductsPerspective: Verification & Validation Engineering Activity: Ind. SW Verification Process Implementation

Diagram: IMP-SS-311



Determine the Independent

Verification effort for the SW Product

IMP-SS-311.1[VPP-1 / T]

Establish the Independent

Verification ProcessIMP-SS-311.2

[VPP-2/T]

Select the organization responsible for

conducting the IV&V

IMP-SS-311.3[VPP-3 / T]

Determine the activities/SW products

that require IV&VIMP-SS-311.4

[VPP- / T]

Develop and document an Independent Verification Plan

IMP-SS-311.5[VPP-5 / T]

IndependentVerification plan

SW IV&V SUPPLIER

SW IV&V SUPPLIER

CUSTOMERSATELLITE SUPPLIER

SW IV&V SUPPLIERSATELLITE SUPPLIER

CUSTOMER

SW IV&V SUPPLIER

ISatellite SW Independent Verification Process

Problem and non-conformance

Reports

SW integration Reports

IndependentDesign Verification report

Independent Design Verification report

Preliminary Detailed Design Data Packages

Products Project documentation

IndependentTest specification

evaluationIndependent SW Integration Verification

report

IndependentCode Verification report

Requirements Independent Verification report

Verification plan


plan


plan

Parent: IV &V of SW ProductsPerspective: Verification and Validation Engineering Activity: Independent SW Verification Process

Diagram: IMP-SS-312



Independently VerifyCodeIMP-SS-312.3

[VPI-3 / T]Independently Verify

SW IntegrationIMP-SS-312.4

[VPI-4 / T]

Independently Verify SW Documentation

IMP-SS-312.5[VPI-5 / T]

Independently Verify SW Design

IMP-SS-312.2[VPI-2 / T]

Independently Verify SW Requirements

IMP-SS-312.1[VPI-1/T]


plan


plan

Preliminary PDR Data Packages

Delivered Products code

Problems and non-conformances Handling

IMP-SS-312.6[VPI-6 / T]Independent

Verification plan:criticality and effort

SW IV&V SUPPLIER

SW IV&V SUPPLIER

SW IV&V SUPPLIER

SW IV&V SUPPLIER

SW IV&V SUPPLIER

SW IV&V SUPPLIER

SW Products Technical Specifications

IIndependent SW Validation Process Implementation

IndependentValidation

plan: methods & tools

Perspective: Verification & Validation Engineering Activity: Ind. Validation Process Implementation Diagram: IMP-SS-313



Validation plan:

organization

Independent Validationplan:

effort &independenceDetermine the

Independent Validation effort for the project

IMP-SS-313.1[PLAN-1 / T]

Establish the Independent Products

Validation ProcessIMP-SS-313.2[PLAN-2 / T]

Establish the Independent Products

Validation ProcessIMP-SS-313.2[PLAN-2 / T]

Develop and document the Independent Validation plan

IMP-SS-313.3[PLAN-4 / T]

Validation plan

Independent Validation Plan

at SW System PDR

SW IV&V SUPPLIER

SW IV&V SUPPLIER

SW IV&V SUPPLIERSpace Segment Requirements



Parent: IV &V of SW Products

IIndependent SW Validation against the Requirements Baseline

IndependentSW design

and test evaluation

reports

IV&V ReportsNCRs, SPRs

SW product,Validation

environment (HW/SW)

SW Validation Testing Spec

Perspective: Verification & Validation Engineering Activity: Independent Validation of the SW Products Diagram: 314



Independent. Software Validation Testing Spec. Definition

IMP-SS-314.1[VI-1 / T]

Assess the SW products Preparation

for Delivery IMP-SS-314.5

[VI-5 / T]

IndependentlyEvaluate the design,

code, test and operation manual

IMP-SS-314.4[VI-4 / T]

Ind. Validation Testingagainst the RB

IMP-SS-314.2[VI-2 / T]

Assess the adequacy of the operation manual

IMP-SS-314.3 [VI-3 / T]

SW on delivery media,SW release

documentation,Baseline deliverables

SW product

Operation manual (update)

IndependentTest Readiness

Assessment

Independent Test Readiness

Review Board

SW IV&V SUPPLIERSW IV&V

SUPPLIER

SW IV&V SUPPLIER

SW IV&V SUPPLIER

SW IV&V SUPPLIER

Check Coverageof SW Supplier & Independent Tests

Parent: IV &V of SW Products

Space Segment

Requirements



ECSS Software Process Model Implementation Examples

The Ground SegmentSystem Processes

The Ground SegmentSW Products


Ground SoftwareProcesses

A-2

ImplementationSamples

The Ground SegmentOperations & Mission

ProductsLife Cycle Processes

External References


Ground SegmentSoftware System

Life-cycle Process

GS-100

Parent: Satellite SW Life Cycle ProcessesPerspective: ALL Activity Satellite Software Processes Diagram: IMP-GS-000

Ground Segment Requirements

Ground Segment Constraints

ECSS SW Artifacts

Ground SegmentSoftware Products

Life-cycle Processes

GS-200

Ground SegmentSoftware Products

Life-cycle Processes

GS-200SW Products Requirements

ECSS SW Artifacts


Ground SegmentOperation & Mission

Products Preparation Processes

GS-300

Ground SegmentOperation & Mission

Products Preparation Processes

GS-300


Mission Needs

Operations & Mission SW

Products

ECSS SW Artifacts

Ground Segment Software Processes I



Validated Ground Segment SW

CUSTOMER / GROUND SEGMENT SUPPLIER

GROUND SEGMENTOPERATOR / MAINTAINER

SW SUPPLIERS

Ground Segment Software Product

Releases

Space Segment

Artifacts & Products

Operations Procedures &

Flight Plans

External References



Primary Life Cycle Processes

GS-110

Parent: Ground Segment Software System LC ProcessPerspective: ALL Activity:Primary Life Ccle Processes Diagram: IMP-GS-100


Ground Segment

Constraints

Space Segment

Artifacts & Products

ECSS SW Artifacts

Ground Segment Software - Software System Life Cycle Processes I


Ground Segment Software System

Supporting Life Cycle Processes

GS-120


Organizational Life Cycle Processes

GS-130


Validated Ground Segment SW

TCUSTOMER / GROUND SEGMENT SUPPLIER



Independently Determined

Process & Software Problems

External References


Parent: Ground Segment SW System LC ProcessesPerspective: ALL Activity: SW System Primary LC Process Diagram: IMP-GS-110

Ground Segment Software System Primary Life Cycle Processes I

Ground Segment Products

Supply ProcessesIMP-GS-112 [PLC-2 / T]

Ground Segment Products

Supply ProcessesIMP-GS-112 [PLC-2 / T]

Ground Segment SystemsAcquisition Process

IMP-GS-111 [PLC-1 / T]

Satellite & Ground Segment Software Maintenance and

MigrationIMP-GS-115 [PLC-5]

Maintenance Plan

Change Justification

File

Ground SegmentSoftware Operations Engineering Process

IMP-GS-113 [PLC-3] Operational Plan

Operational Requirements

Maintenabilty Requirements

GROUND SEGMENT SUPPLIER

CUSTOMER



OPERATORCUSTOMER

GROUND SEGMENT SUPPLIER SW MAINTAINER

ITT/RFQ

Negotiated Ground Segment

Contract

Proposal



Facilities & DBs

Ground Segment Reusable

Facilities & DBs


Ground Segment Constraints


SW Products

Requirements

Validated

SW Products

Ground Segment Systems Software Engineering Process

IMP-GS-114 [PLC-4 / T]

Activity: SW Systems Engineering ProcessDiagram: IMP-GS-114

Ground Segment Software System Engineerring Process I

Parent: Ground Segment SW System Primary LC Process Perspective: Software Engineering

Negotiated Customer

Requirements



GS Software Systems Requirements Engineering

Process

IMP-GS-114.1 [SEP-1/T]

GS Software Interfaces Management





File

ECSS-M-30 Project

Requirements

GS Software Project Phasing and Planning

IMP-GS-114.4 [SEP-4 /T]LC Requirements

for the SW Products


GS Software & Data Technical Budget and Margin Management


HW Environment



SW Products I/F Requirements

SW Products Budget

Requirements


Released SW Products

GS Software Systems Integration & Qualification

IMP-GS-114.3 [SEP-3 /T] Qualified SW System

Configuration






GROUND SEGMENT SUPPLIER / CUSTOMER

Activity: Satellite SW System Requirements Engi.ngDiagram: IMP-GS-114.1

Ground Segment Software System Requirements Engineering Process

Overall GS System

Requirements


RB (System Partitioning with definition of items; System Configuration list)

IRD (SW/HW Interface Requirements)DJF (Traceability to system partitioning)

Parent: Ground Segment SW System Engineering Process Perspective: Software Engineering



System Level Rqmts for SW Verification

and Validation IMP-GS-114.1.3

[SE –3 /T]

SystemSRR

System Requirements

Analysis IMP-GS-114.1.1

[SE –1 /T]

System Partitioning

IMP-GS-114.1.2[SE-2 /T]

System Level Integration of

SoftwareIMP-GS-114.1.4

[SE –4 /T]

SRR Data PackageRB, IRD

DJF


Reviewed SRR Data Package

RB, IRDDJF

I

GS SUPPLIER GS SUPPLIER

GS SUPPLIER

GS SUPPLIER

RB: V&V ProcessRequirements

SpecificGround Software

Test Planning & Test Facilities

Requirements

T

Ground SW ReuseProcess

T

ReusableSpace Segment

& Existing Ground

Segments SW

Integrated HW-SW

Test Requirements

SW SRRs

Ground Segment Software System Requirements Analysis I

RB: Functions & Performance

RqmtsIRD: Interface

Rqmts

Parent: Software System Requirement Engineering ProcessPerspective: Software Engineering Activity: System Requirements Analysis Diagram: 114.1.1

External References: ECSS-E-40 sec. 5.2.2.1, 5.2.2.2, 5.2.6.2


Definition of system functionalities and

interfacesIMP-GS-114.1.1.1

SYS-1

Overall system reqmts

Operations and Maintenance

Requirements DefinitionIMP-GS-114.1.1.2

SYS-2

V&V Rqmts and Design Constraints

IMP-GS-114.1.1.3SYS-3

GS Systems Criticality/ Critical Functions

DefinitionIMP-GS-114.1.1.4

SYS-4RB:- Safety &

Reliability Rqmts- Critical functions

identification

RB: Design Constraints

V&V requirements- SW Eng. Standards

RB: Operations and maintenance requirement


CUSTOMER

CUSTOMER

CUSTOMER

CUSTOMER Assess I&V Req.sfor

Ground Facilities

Human Factors, Simulation, DB, & Real-time

Engineering Requirements Definition

Human Factors, Simulation, DB, & Real-time

Engineering Requirements Definition

RB:Specific Design & Implementation Requirements

IGround Segment Software System Integration & Qualification Process


Parent: GS SW System Engineering ProcessPerspective: Software Engineering Activity: GS SW System Integration & QualificationDiagram: IMP-GS-114.3


Released SWProducts

GS Software Systems Integration

IMP-GS-114.3.2

GS SUPPLIER


Configuration(s)

GS Software Systems Testing

IMP-GS-114.3.3

GS SUPPLIER

Tested System SW

Configuration

Validated SW

Products

GS Systems I&V

IMP-SS-114.3.4

GS SUPPLIER

Qualified SWSystem

Configuration

GS Software Systems Integration & Test

Definition

IMP-GS-114.3.1

GS SUPPLIER

System SW Integration & Test

ProceduresReleased SW Products

System DDF, DJF, TS,

RB, IRD, ICD

System SW Test

Procedures

System Test Procedures


Configuration(s)

System SW Integration Procedures

Space Segment Products

Space Segment Products

IGround Segment Software System Project Phasing and Planning

Elements of Satellite & GS

Maintenance Plan



Standards


Plan

Parent: Ground Segment SW System Engineering Process Perspective: Software Engineering Activity: Project Phasing and PlanningDiagram: IMP-GS-114.4




Requirements Baseline at SRRSoftware System Development Plan

Software SystemLife Cycle Definition

& Planning

IMP-GS-1114.4.1[SLC-1 / T]

Documentation/Inputs-Output Process

definition for each Phase and Milestone

IMP-GS-114.4.3[SLC-3 / T]

SRRGS System vs. Software Requirements

Requirements BaselineSW System

Development Planning Information

Tailoring of ECSS SW Engineering

Standards & ModelIMP-GS-114.4.2

[SLC-2 / T] Requirements BaselineSW System

Development PlanningInformation

Software System Development Plan

Review

E11

EI2

EI3

Definition of specific

Methodologies & Complementary

StandardsIMP-GS-114.4.5/T

Specific Methodologiesand complementary

Standards(e.g., RT SW, Testing, etc.)

GS SUPPLIER

GS SUPPLIER

GS SUPPLIER

GS SUPPLIER

Software Re-usePlanning

T

IGround Segment Software Interfaces Management

Interface Management procedures,

Part of configuration management plan

ECSS-M-40Requirements

Parent: Ground Segment SW System Engineering Process

Perspective: Software Management Activity: Interface ManagementDiagram: IMP-GS-114.5

External References: ECSS-E-40 sec. 5.3.3.1


Definition of interfaces management procedures

DefinitionIMP-GS-114.5.1

IM-1

CUSTOMER

SRR Data Package


Space to Ground SegmentInterfaces Specific

Management ProceduresDefinitionSpace Segment Interfaces

Control Procedures