Integration of UX into CENELEC 50128 based processes · 2020. 12. 2. · CENELEC 50126/50128 V -model • The EN 50126 defines theV-model • Often used in phases: • Concept, system

Integration of UX into CENELEC 50128 based processes

Marc Burkhardt – Siemens Mobility GmbH4th German Workshop on Rail Human Factors – 2nd of December

Restricted | © Siemens 2020 | Marc Burkhardt | Siemens Mobility GmbH | 2020-12-02


UX vs CENELECBy Bill Toenjes under CChttps://www.flickr.com/photos/toomuchdew/

Motivation

• Customer products in everyday life gets user friendly• Users expect this from industrie produtcs as well• User-centered approach helps to reduce error costs

• Forrester Study1: “Human-centered design improved product outcomes and reduced the risk of costly failures”

• Deutsche Bahn2: reddot winner 2019 for the User Experience Design Relaunch ICE Portal


1: The Total Economic Impact™ Of IBM’s Design Thinking Practice, Forrester Total Economic Impact™ Study Commissioned By IBM February 2018

2: https://www.red-dot.org/de/project/ice-portal-41303

https://i0.pickpik.com/photos/738/736/47/railway-bernina-railway-lagalb-bernina-preview.jpg

Actual Development Processes


The current development processes are guided by norms (from Safety, Quality and IT Security).

These three areas ensure safety, functionality and reliability.

What about efficiency, effectiveness, satisfaction and joy?

Current development processes in railway industry

SafetyCENELEC 5012x

QualityISO 9001

IT-SecurityIEC 62443-4-1

User ExperienceISO 9241

joy

efficiency,effectiveness,satisfaction

reliability

functionality

Usability

Actual development process

Development

Use

r exp

erie

nce

CENELEC 50126/50128 V-model

• The EN 50126 defines the V-model• Often used in phases:

• Concept, system definition, risk analysis, requirement, architecture, software/hardware design, implementation, integration, validation, system acceptance, operation and decommissioning

• Each phase has it verification measures• Overall is RAMS(s)

• New agile approaches, often used only in implementation

• Fun fact: “user needs” are only mentioned in the validation


EN 50126 – figure 7https://commons.wikimedia.org/wiki/File:Scrum_process.svg

https://commons.wikimedia.org/wiki/File:Scrum_process.svg

Human Factors and UX

Human factors: Which human characteristics have to be considered in order to • enable smooth interaction at the human-machine interface

(Surface)• optimally match a technical environment to the individual

(Framing)• optimally distribute the tasks, authorities and responsibilities

between the individual and the computer (Structure)• mitigate the consequences of technical and human errors

(Scope)• improve the safety and efficiency of the overall human-machine

system (Strategy)


ISO 9241-210 – UX process

• Goal: Requirements and recommendations for human-centered design principles and activities throughout the life cycle of computer-based interactive systems

• No separate process• Human-centered activities are integrated into

existing processes• Design is based on an explicit understanding of

users; they may be involved throughout development

• Process is iterative until the user needs/requirements are met


UX in CENELEC


EN 50126 – figure 7

PersonasUser GroupsContextual interview

Usage requirements

Mock-upWireframeInteractive prototype

User feedbackSUMIAttrakDiffSUS

Inspection of usage requirements

Scenario-based walkthroughHeuristic evaluationThinking-aloud user testingHeuristic evaluation

UX and CENELEC

• UX and CENELEC are not a contradiction• UX has to be integrated into development

processes• Iterative or agile process fits to ISO 9241-210• In addition to safety, function and security, focus on

user needs• Awareness of UX in all roles

• Easiest task to start: • Talk to your users not only with your contractors



Justice LeagueUX and CENELEC 50128

© Warner Brothers – LEGO Batman Movie

ContactPublisher: Siemens Mobility

Marc BurkhardtUsability EngineerSMO RI R&D SYS DA&AAckerstrase 2238126 BraunschweigGermany

Telefon +49 173 637 97 30

E-Mail [email protected]

Restricted | © Siemens 2020 | Marc Burkhardt | | 2020-12-02Siemens Mobility GmbH

mailto:[email protected]

Documents

Integration of UX into CENELEC 50128 based processes · 2020. 12. 2. · CENELEC 50126/50128 V -model • The EN 50126 defines theV-model • Often used in phases: • Concept, system