What are the benefits of A3 and PDCA for Agile teams? A presentation by Antoine Contal and Philippe Blayo at the European Lean IT Summit 2012. More Lean IT presentations and videos available on www.lean-it-summit.com

1. Copyright © Institut Lean France 2012
22 & 23 November, 2012
Paris, France
Agile and A3
Philippe Blayo & Antoine Contal

2. Copyright © Institut Lean France 2012
22 & 23 November, 2012
Paris, France
Agile and A3
Philippe Blayo & Antoine Contal
Agile and A3 - Philippe Blayo & Antoine Contal

3. Copyright © Institut Lean France 2012
22 & 23 November, 2012
Paris, France
What are the
benefits of A3 and
PDCA for Agile
teams?
Agile and A3 - Philippe Blayo & Antoine Contal

4. Copyright © Institut Lean France 2012
22 & 23 November, 2012
Paris, France
BOOST
THIS
AGILE
TEAM
Agile and A3 - Philippe Blayo & Antoine Contal

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22 & 23 November, 2012
Paris, France
20K€
Agile
Consulting
Agile and A3 - Philippe Blayo & Antoine Contal

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Paris, France
Team
Building
Agile and A3 - Philippe Blayo & Antoine Contal

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Project
Termination
Agile and A3 - Philippe Blayo & Antoine Contal

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TWICE
THE PRICE:
WHY?
Agile and A3 - Philippe Blayo & Antoine Contal

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POST MORTEM A3

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Paris, France
Agile and A3 - Philippe Blayo & Antoine Contal

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Paris, France
Agile and A3 - Philippe Blayo & Antoine Contal

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Paris, France
Agile and A3 - Philippe Blayo & Antoine Contal

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Paris, France
Component
API Width
Agile and A3 - Philippe Blayo & Antoine Contal

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Fact
Based
Decision
Making
Agile and A3 - Philippe Blayo & Antoine Contal

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Paris, France
blayo in blayo dot org
antoine dot contal in gmail dot com

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22 & 23 November, 2012
Paris, France
A3
about
stats losses
Agile and A3 - Philippe Blayo & Antoine Contal

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Paris, France
ASK
An
EXPERT
Agile and A3 - Philippe Blayo & Antoine Contal

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Paris, France
Agile and A3 - Philippe Blayo & Antoine Contal

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22 & 23 November, 2012
Paris, France
Agile and A3 - Philippe Blayo & Antoine Contal

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22 & 23 November, 2012
Paris, France
Agile and A3 - Philippe Blayo & Antoine Contal

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22 & 23 November, 2012
Paris, France
Agile and A3 - Philippe Blayo & Antoine Contal

22. Copyright © Institut Lean France 2012
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Paris, France
1
1
Agile and A3 - Philippe Blayo & Antoine Contal

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Paris, France
Agile and A3 - Philippe Blayo & Antoine Contal

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Paris, France
2
2
Agile and A3 - Philippe Blayo & Antoine Contal

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Paris, France
Agile and A3 - Philippe Blayo & Antoine Contal

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Paris, France
1
2
3
3
Agile and A3 - Philippe Blayo & Antoine Contal

27. Copyright © Institut Lean France 2012
22 & 23 November, 2012
Paris, France
Agile and A3 - Philippe Blayo & Antoine Contal

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Paris, France
BATCH
FIXED
Agile and A3 - Philippe Blayo & Antoine Contal

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Paris, France
one year later
Agile and A3 - Philippe Blayo & Antoine Contal

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Paris, France
HTTP Access Freeze
# OF HTTP ACCESS PER MINUTE
Agile and A3 - Philippe Blayo & Antoine Contal

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22 & 23 November, 2012
Paris, France
Agile and A3 - Philippe Blayo & Antoine Contal

32. Copyright © Institut Lean France 2012
22 & 23 November, 2012
Paris, France
22:24:00
LOG:
Lock end on table ... duration: 1 milliseconds
...
22:25:00 Lock end on table ... duration: 2 milliseconds
...
22:29:59 Lock end on table ... duration: 101569 milliseconds
22:30:00 Lock end on table ... duration: 101245 milliseconds
Agile and A3 - Philippe Blayo & Antoine Contal

33. Copyright © Institut Lean France 2012
22 & 23 November, 2012
Paris, France
HTTP freeze duration = DB lock duration
freeze duration
freeze duration
# OF HTTP ACCESS PER MINUTE
101569 milliseconds
101245 milliseconds
Agile and A3 - Philippe Blayo & Antoine Contal

34. Copyright © Institut Lean France 2012
22 & 23 November, 2012
Paris, France
BEFORE AFTER
lock read
read lock
write write
unlock unlock
Agile and A3 - Philippe Blayo & Antoine Contal

35. Copyright © Institut Lean France 2012
22 & 23 November, 2012
Paris, France
CHECK:
1.5 Days
vs
Weeks
Agile and A3 - Philippe Blayo & Antoine Contal

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22 & 23 November, 2012
Paris, France
ACT
(lessons
learned)
Agile and A3 - Philippe Blayo & Antoine Contal

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Lesson #1
Log durations
to spot
concurrency
issues
Agile and A3 - Philippe Blayo & Antoine Contal

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22 & 23 November, 2012
Paris, France
Lesson #2
Chat with
an expert
Agile and A3 - Philippe Blayo & Antoine Contal

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DEVELOP
FASTER!
Agile and A3 - Philippe Blayo & Antoine Contal

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Adding people?
Agile and A3 - Philippe Blayo & Antoine Contal

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Pressuring people?
Agile and A3 - Philippe Blayo & Antoine Contal

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Paris, France
Agile and A3 - Philippe Blayo & Antoine Contal

43. Copyright © Institut Lean France 2012
22 & 23 November, 2012
Paris, France
Agile and A3 - Philippe Blayo & Antoine Contal

44. Copyright © Institut Lean France 2012
22 & 23 November, 2012
Paris, France
Agile and A3 - Philippe Blayo & Antoine Contal

45. Copyright © Institut Lean France 2012
22 & 23 November, 2012
Paris, France
Agile and A3 - Philippe Blayo & Antoine Contal

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22 & 23 November, 2012
Paris, France
Agile and A3 - Philippe Blayo & Antoine Contal

47. Copyright © Institut Lean France 2012
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Key factor:
access to someone
who knows the
code?
Agile and A3 - Philippe Blayo & Antoine Contal

48. Copyright © Institut Lean France 2012
22 & 23 November, 2012
Paris, France
GUIDE:
How to
manage it?
Agile and A3 - Philippe Blayo & Antoine Contal

49. Copyright © Institut Lean France 2012
22 & 23 November, 2012
Paris, France
Hard - earned
devops
results
Agile and A3 - Philippe Blayo & Antoine Contal

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Paris, France
Quality of Service
collapse
Agile and A3

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End to end
Bench
Agile and A3 - Philippe Blayo & Antoine Contal

52. Copyright © Institut Lean France 2012
22 & 23 November, 2012
Paris, France
Spike in I/O =>
Blame I/O Config
I/O
t
Agile and A3 - Philippe Blayo & Antoine Contal

53. Copyright © Institut Lean France 2012
22 & 23 November, 2012
Paris, France
Lone event
never
reproduced
Agile and A3 - Philippe Blayo & Antoine Contal

54. Copyright © Institut Lean France 2012
22 & 23 November, 2012
Paris, France
Change
I/O config
=> Check NOK
Agile and A3 - Philippe Blayo & Antoine Contal

55. Copyright © Institut Lean France 2012
22 & 23 November, 2012
Paris, France
PROTECT
CUSTOMER:
SPLIT TRAFFIC
Agile and A3 - Philippe Blayo & Antoine Contal

56. Copyright © Institut Lean France 2012
22 & 23 November, 2012
Paris, France
SPLIT TRAFFIC: OK

57. Copyright © Institut Lean France 2012
22 & 23 November, 2012
Paris, France
Add servers
=> Check NOK
Agile and A3 - Philippe Blayo & Antoine Contal

58. Copyright © Institut Lean France 2012
22 & 23 November, 2012
Paris, France
Ask an Expert
Agile and A3 - Philippe Blayo & Antoine Contal

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22 & 23 November, 2012
Paris, France
Ask an Expert
Check OK
Agile and A3 - Philippe Blayo & Antoine Contal

60. Copyright © Institut Lean France 2012
22 & 23 November, 2012
Paris, France
How did the
expert do it?
Agile and A3 - Philippe Blayo & Antoine Contal

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22 & 23 November, 2012
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Production
data
Agile and A3 - Philippe Blayo & Antoine Contal

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Micro bench:
small
Java main()
Agile and A3 - Philippe Blayo & Antoine Contal

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Hypothesis:
I can imitate the expert
and investigate faster
Agile and A3 - Philippe Blayo & Antoine Contal

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6 months later
Agile and A3 - Philippe Blayo & Antoine Contal

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Paris, France
Worsening
response time
Agile and A3 - Philippe Blayo & Antoine Contal

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Hypothesis:
SQL query
Agile and A3 - Philippe Blayo & Antoine Contal

67. Copyright © Institut Lean France 2012
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Paris, France
Small main()
reproduces
issue
Agile and A3 - Philippe Blayo & Antoine Contal

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22 & 23 November, 2012
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Code diff:
join
left join
Agile and A3 - Philippe Blayo & Antoine Contal

69. Copyright © Institut Lean France 2012
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Solution:
join in Java
Agile and A3 - Philippe Blayo & Antoine Contal

70. Copyright © Institut Lean France 2012
22 & 23 November, 2012
Paris, France
Check OK
- issue fixed
- only 1 day work
- small java main works!
Agile and A3 - Philippe Blayo & Antoine Contal

71. Copyright © Institut Lean France 2012
22 & 23 November, 2012
Paris, France
What are the
benefits of A3 and
PDCA for Agile
teams?
Agile and A3 - Philippe Blayo & Antoine Contal

72. Copyright © Institut Lean France 2012
22 & 23 November, 2012
Paris, France
Benefits of using A3 and
PDCA in an agile team
• Help your managers and clients to
make better decisions
• Avoid wasting time on wrong or
irrelevant causes and actions
• Become an outstanding developer
Agile and A3 - Philippe Blayo & Antoine Contal

73. Copyright © Institut Lean France 2012
22 & 23 November, 2012
Paris, France
To play with us:
blayo in blayo dot org
antoine dot contal in gmail dot com
Agile and A3 - Philippe Blayo & Antoine Contal

74. Copyright © Institut Lean France 2012
22 & 23 November, 2012
Paris, France
References:
http://openclipart.org/
Agile and A3 - Philippe Blayo & Antoine Contal

75. Copyright © Institut Lean France 2012
22 & 23 November, 2012
Paris, France
More Lean IT presentations and videos on
www.lean-it-summit.com