Question:What is the difference between a home cook and a professional chef?

The biggest difference between home cooks and professional chefs is that home cooks don't taste the dish often enough as they prepare it. They just follow the recipe step-by-step, without getting that feedback along the way.

[Wolfgang Puck – chef – Owns 20 restaurants]

What is Feedback ?

•The supply of an input to some process or system as a function of its output

What if...

• There was a 30 second delay between pushing the breaks, and your car responding?

• There was a 10 minutes delay between responses in a conversation?

• There was a 15 second delay between pushing the button and this bullet appearing?

Late Feedback Is Useless!

The cost of changes increases exponentially the farther along you are in the development cycle

[Dr. Barry Boehm]

How does a chef work?

Agile is all about Shrinking the feedback loop

[Corey Haines]

Question:What is difference of

feedback loops in agile software development process?

Agile Development Practices

Code Review Feedback Loop

Developer / TL

Developer

Several days

Code Review Feedback Loop

Several minutes

Development

pair

Bug Feedback Loop

ReleaseIntegrator

Developer

Bug tracking System

QA

Team leader

between 1 week and 1

month

Bug Feedback Loop

Developer

3 to 10 minutes

1 to 3 daysQA

Unit test

Build status Feedback Loop

SCMsystem

Developer

QA

Releaseintegrator

Bug trackingSystem

between 1 day and 2 weeks

Build status Feedback Loop

SCMsystem

Developer

between 5min and 1 hour

CI Server

Agile Feature Management

Requirement Feedback Loop

Marketing System

Team leader

Between 3 month and 1 year

Customer

Developer

Customer

ProductOwner

between 1 to 4 weeks

Developer

Requirement Feedback Loop

Acceptance

tests

up to 3 days

Feature Progress Feedback Loop

TeamLeader

Developer

Project Manager

Tool

Plan

between 1 week and 1

month

Developer

Max. Daily

Max. DailyTask Board

& Burn down

Rest ofthe Team

PlanMax. Sprint length

Feature Progress Feedback Loop

Agile ProjectManagement

Regression Feedback Loop

SCMsystem

Developer

QA

Releaseintegrator

Bug trackingSystem

between 1 week and 2

month

Regression Feedback Loop

SCMsystem

Developer

between 30min and 6 hours

CI Server

TeamLeader

Developer

Project Manager

LessonsLearned

QA

Once per release

Not enough

testing

Improvement Feedback Loop

Improvement Feedback Loop

Developer

Project Manager

QA

Once per sprint

Retrospective

Keep It Simple

Summary

Let’s Look At The big Picture

Development

Practiceslevel

Featurelevel

Projectlevel

Success is about:

FeedbackloopsNested

Short FastManyHaving

Shrink The Feedback Loop

Improve The Feedback Loop

• Pair Programming• Unit testing \ TDD.• Having the QA eng.

Inside the team.• Running Automatic

build process.• Working in short

Iterations.• Documenting

Acceptance tests.

• Having daily meetings.

• Using Burn-Down charts.

• Running Automatic test process.

• Doing Retrospectives.

• KPIs at the right level.

Thank you

Any Questions ?

Elad Sofer - Agile coachwww.theScrumster.com / @eladsof / elad.sofer@gmail.com