In this talk, you may heard some criticism around scrum and process, but this is mainly about values and learning. Understanding feedback in a better way with less dogmatism is the better way to lead to better products

1. FEEDBACK LOOPS
To infinity, and beyond !…
iterative thoughts by Rui Carvalho
@rhwy#rcfbloops talk@rui.fr
Lightening version

2. WHO AM I?
AN INDEPENDENT
Software
Craftsman WITH
STRONG
COMMUNITY
FOCUS
@rhwy
ncrafts.io

3. WHY I’M HERE TO TALK ABOUT
FEEDBACK LOOPS ?

4. TIME TO FOCUS
WHAT’S REALLY IMPORTANT?
Stay Questioned

5. HAVE YOU HEARD ?
• TDD IS DEAD
(David Heinemeier Hansson, @dhh)
• AGILE IS A CANCER
(Erik Meijer, @headinthebox)
« TDD is killing your
creativity »
« .. if your company is doing TDD,
leave, TDD is a waste of time … »

6. WHY THESE SMART PEOPLE
ARE THEY COMPLAINING?

7. HOW IS YOUR AGILE THING?
✓do you produce more value than
before?
✓is the quality of your product better?
✓do you provide that value more quickly
to the final end user?
✓Are you more confident?

8. Don’t you want to scream
sometimes?

9. HOW ARE we ARRIVED
TO THIS Mess ?

10. Because people that don’t understand
core values focus on processes

11. LET’S SEE FROM WHERE ALL
THIS CAME

12. AMONG OTHER VALUES …
Feedback
Communication
Simplicity
Courage
Respect

13. FEEDBACK !

14. XP

15. AGAIN, LET’S HAVE A LOOK AT
SCRUM

16. WE FORGOT HALF OF THE
FEEDBACK!

17. WE NEED ALL LOOPS TO
PROVIDE QUALITY!
Project
Management
Code & Quality

18. LET’S UNDERSTAND THESE
feedback loops

19. ITERATION FACILITATORS
Iteration Size =
1
Task Difficulty
granularity & baby steps
are the key of good
incremental software

20. BECAUSE IT’S ABOUT
FEEDBACK,
AND BECAUSE WE’RE DOING SMALL ITERATIONS
WE CALL THAT FEEDBACK LOOPS …

21. FEEDBACK LOOPS ARE real THINGS
NOT ONLY SOFTWARE DEVELOPMENT
PROJECTIONS
But,

22. FEEDBACK LOOPS
FEEDBACK LOOPS OCCURS WHEN THE
OUTPUT OF A SYSTEM A FEEDS THE INPUT
OF A SYSTEM B THAT IN RETURN FEEDS THE
INPUT OF THE ORIGINAL SYSTEM A
A B

23. AND MORE IMPORTANT,
THERE IS 2 KINDS OF FEEDBACK LOOPS:
THE POSITIVE ONE
AND THE NEGATIVE ONE
A B

24. ATTENTION,
Common non-sens tend to define:
Positive feedback = Good
Negative feedback = Bad
&

25. BAD
IT’S NOT ABOUT
&
GOOD

26. REGULATION
IT’S ABOUT
&
AMPLIFICATION

27. POSITIVE
Feedback Loops
POSITIVE IS A LOOP
GAIN THAT MEANS :
PRODUCTION OF A WILL
HELP MORE
PRODUCTION OF B,
THAT IN RETURN WILL
HELP MORE AND MORE
PRODUCTION OF A
AMPLIFICATION

28. NEGATIVE
Feedback Loops
NEGATIVE
FEEDBACK LOOP
OCCURS WHEN YOU
NEED TO REDUCE
FLUCTUATIONS OR
DISTURBANCES IN
YOUR SYSTEM REGULATION

29. APPLYING TO YOUR WORK:
That means, doing small iterations, is not the only key,
you also need to understand what objectives you are
your trying to reach!

30. FOR EXAMPLE,
You want to estimate better?
- setup negative feedback loops that stabilise
your system in order to keep it more predictable
You want to learn things for a new
business:
- setup positive feedback loops to grow your
ideas

31. ANOTHER EXAMPLE
BEER PONG
For Ground, Pots
TDD will help!
For Angle, Force:
test it live !
Constraints
Boundaries

32. WHAT DOES THAT MEAN
REALLY?

33. KEEP THE FOCUS ON THE
Why YOU ARE DOING
SOMETHING BEFORE THE How

34. SAME RULES DON’T APPLY
EVERYWHERE!
THAT’S WHY YOU NEED TO :
(aka : no silver bullet process)
- UNDERSTAND THE values
- APPLY THE principles
- PRACTICE, PRACTICE, practice

35. BEING A GOOD
Software craftsman
ALSO MEANS
BEING MORE
PRAGMATIC AND
LESS DOGMATIC

36. AGILE IS ABOUT
Feedback

37. AND FEEDBACK IS ABOUT
Learning

38. THAT
MEANS,
Agile
IS ABOUT
Learning

39. CAREFULLY SETUP AND LISTENING
TO YOUR feedback loops IS THE
BEST WAY OF
Learning
&

40. AND CONTINUOUS LEARNING BY
small iterations IS THE BEST WAY
TO BUILD THE RIGHT PRODUCT
=>

41. FLACCID SCRUM
Applying agiles
process process
without code quality
only lead you to
produce technical
debt more quickly!

42. Be Not Only Agile

43. Thank you!
ncrafts.io
May 2016
Paris, France
Software
Craftsmanship -
Practices - Functional -
DDD - DevOps - Agile -
Learning - Exchange -
Tests
@rhwy
https://www.stickermule.com/marketplace/6231-noagile

44. the great illustrative icons came from the
awesome nounproject.com
Feedback Loops
v1.5
Lightening Talk version
2015-10-28