feedback loops the power of - scrum alliance
TRANSCRIPT
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THE POWER OF FEEDBACK LOOPS
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Hello!I am Luca Mezzalira
Solutions Architect at Massive Interactive
Co-Organiser of Agile 101 and Agile Leadership Communities in London
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Agenda
▷ What is the feedback loop ?
▷ Empirical vs Scientific approach
▷ How can I integrate the feedback loop in my software development flow ?
▷ Collect data to analyse
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1.The FEEDBACK LOOP
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“The section of a control system that
allows for feedback and self-correction and that adjusts its
operation according to differences between the actual and the desired
or optimal output
http://www.thefreedictionary.com/feedback+loop
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“Feedback loops provide generic mechanisms for controlling the
running, maintenance, and evolution of software and
computing systems.
https://en.wikipedia.org/wiki/Feedback
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Feedback Loop in Scrum
❖ Sprint
➢ Daily standup
➢ Sprint Retrospective
➢ Sprint Review
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PDCA Cycle: the loop behind the continuous improvement
❖ Plan
❖ Do
❖ Check
❖ Act
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Feedback Loops Characteristics in Grows Method
❖ real time
❖ direct
❖ short
❖ small
❖ concrete
❖ mesurable
http://growsmethod.com/
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Why is feedback loop so important in software development ?
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2.EMPIRICAL vs SCIENTIFIC
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H2OH2OH2O
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Keywords
EXPERIMENTS
TRIALS
FEEDBACK
METRICS
SMALL & CONSTANT
FOCUS
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Let’s createa chain of loops!
❖ Automation Testing*
❖ Continuous Integration*
❖ Pair Programming*
❖ Code Reviews*
❖ Static Analysis*
❖ QA testing
❖ Emergent Design*
❖ Standup
❖ Sprint Review
❖ Sprint Retrospective
secs
mins
hours
days
weeks
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MA
IN G
OA
LS
● CODE QUALITY
● CODE STANDARDS
● CATCH BUGS EARLY
● BETTER PERFORMANCES
● MAINTAINABILITY
● MEET THE REQUIREMENTS
● CREATE VALUE
● SHARE KNOWLEDGE WITHIN THE TEAM
● CONTINUOUS IMPROVEMENT
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Remember remember...
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3.INTEGRATE feedback
loops inside your FLOW
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Software testing is an investigation conducted to provide stakeholders with information about the quality of the product or service under test.
Software testing can also provide an objective, independent view of the software to allow the business to appreciate and understand the risks of software implementation.
Automation Testing
Feedback frequency: SECONDS
Goals: CATCH BUGS EARLIER, CODE QUALITY & MAINTAINABILITY
https://en.wikipedia.org/wiki/Software_testing
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Continuous Integration (CI) is a development practice that requires developers to integrate code into a shared repository several times a day. Each check-in is then verified by an automated build, allowing teams to detect problems early.
By integrating regularly, you can detect errors quickly, and locate them more easily.
Continuous Integration
Feedback frequency: SECONDS
https://www.thoughtworks.com/continuous-integration
Goals: RELIABLE CODE, CREATE VALUE, CODE QUALITY & STANDARDS, CATCH BUGS EARLIER
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Pair programming (sometimes referred to as peer programming) is an agile software development technique in which two programmers work as a pair together on one workstation.
One, the driver, writes code while the other, the observer, pointer or navigator, reviews each line of code as it is typed in.
The two programmers switch roles frequently.
Pair Programming
Feedback frequency: SECONDS
https://en.wikipedia.org/wiki/Pair_programming
Goals: SHARED KNOWLEDGE & BETTER CODE QUALITY
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Code review is systematic examination (often known as peer review) of computer source code.
It is intended to find and fix mistakes overlooked in the initial development phase, improving both the overall quality of software and the developers' skills
Code Reviews
Feedback frequency: MINUTES
https://en.wikipedia.org/wiki/Code_review
Goals: BETTER CODE QUALITY, PERFORMANCE IMPROVEMENTS & SHARED KNOWLEDGE
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Static program analysis is the analysis of computer software that is performed without actually executing programs (analysis performed on executing programs is known as dynamic analysis).
In most cases the analysis is performed on some version of the source code, and in the other cases, some form of the object code.
Static Analysis
Feedback frequency: MINUTES
https://en.wikipedia.org/wiki/Code_review
Goals: BETTER CODE QUALITY, CODE STYLE COMPLIANT & PERFORMANCE IMPROVEMENT
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Emergent design is a consistent topic in agile software development, as a result of the methodology's focus on delivering small pieces of working code with business value.
The end result is a simpler design with a smaller code base, which is more easily understood and maintained and naturally has less room for defects
Emergent Design
Feedback frequency: HOURS
https://en.wikipedia.org/wiki/Emergent_Design
Goals: BETTER CODE QUALITY, HANDLE NEW REQUIREMENTS & MAINTAINABILITY
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4.Collect data to analyse
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Wrap up
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Instructions for use
OFTENMore feedback loops will allow your project to hit your users/customers goals
SHORTKeep the iterations as short as possible in order to close more feedback loops as possible
MEASURABLECollect information and metrics in order to improve your current situation
CONTINUOUS IMPROVEMENTAdd an improvement per time, don’t add too many techniques too often!
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Thanks!Any questions?
You can find me at:
@lucamezzalira
www.lucamezzalira.com