dont limit yorself beyond kanban - presentation - paulo caroli
DESCRIPTION
Paulo Caroli presentation on the target-variance model. Beyond Kanban.TRANSCRIPT
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Agenda
• Workflow
• Card Wall
• Important parameters
• Kanban mechanics
• Replenishment
• Going Beyond
• Q&A
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Workflow
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A workflow is a sequence of
steps and activities of work
performed by a person or a team
to achieve a specific goal.
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Stage 1 Stage 2 Stage
N
Final
Goal
(Done)
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Workflow examples
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Visible workflow
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We have been using
Card Walls for a long time…
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The workflow stages
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The workflow stages
the work
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“these card walls are not inherently
kanban systems. They are merely
visual control systems. They allow
teams to visually observe work-in-
progress and to self-organize, assign
their own tasks, and move work
from a backlog to complete”
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David has a point…
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Parameters from
a simple card wall
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Doing DoneTo Do
10
5
9
3118
17
21
4
75
112
John
Suzy
Paul
Amy
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Doing DoneTo Do
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John
Suzy
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Amy
WIP
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Doing DoneTo Do
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Lead Time
10 10Day 1Day 6
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Doing DoneTo Do
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Suzy
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Day 1
Throughput
Day 2
Day 3
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Kanban mechanics
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DoingDoneTo Do
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John
Suzy
Paul
Amy
WIP
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Doing
(Limit) DoneTo Do
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Suzy
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Amy
WIP
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Doing
(Limit) DoneTo Do
10
5
9
3118
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John
Suzy
Paul
Amy
WIP
ThroughputDemand
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Doing
(Limit) DoneTo Do
10
5
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Suzy
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Amy
WIP
ThroughputDemand
Balance demand against throughput
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Doing
(Limit) DoneTo Do
10
5
9
3118
17
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75
112
John
Suzy
Paul
Amy
WIP
Lead Time
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Doing
(Limit) DoneTo Do
10
5
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3118
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Suzy
Paul
Amy
WIP
Lead Time
increased lead time => poorer quality
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Doing
(Limit) DoneTo Do
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WIP
Lead Time
# WIP is proportional to average lead time
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Before and After
example
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In Dev In QCBacklog Q
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Any problem?
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Limit
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Pull System, Queue and Limits
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80% done on Card #9
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Don’t limit yourself
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Replenishment
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Replenishment is driven by actual
consumption, not sales forecasts
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I have seen this before…
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Eggplant at the wall
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Rethinking nomenclature…
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Target instead of Limit
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“Yet another choice would be to
… adopt a policy of exceeding
the WIP limit when a burst of
production text changes arrives...
This was the choice made in the
real example ...”
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Should we accept variance?
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“For example, if we had ten
people and anticipated two
people per item, the WIP limit
might be five plus a few more to
smooth the impact of a
blockage. Perhaps eight (five plus
three) would be the right limit in
such circumstances.”
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… so we are already dealing with
variance for upper limit…
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… but, what about
a variance for less?
(to avoid starvation)
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Variance to cope with SW
development empirical nature
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“For example, if we had ten
people and anticipated two
people per item, the WIP limit
might be five plus a few more to
smooth the impact of a
blockage. Perhaps eight (five plus
three) would be the right limit in
such circumstances.”
![Page 92: Dont limit yorself beyond kanban - presentation - paulo caroli](https://reader033.vdocuments.net/reader033/viewer/2022061206/5481d2b45806b5d9048b45d0/html5/thumbnails/92.jpg)
Make it visible!
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[5,3] instead of (8)
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Rob Ben
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SueMar
y
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Tom
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[4,2]
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[2,1]
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Rob Ben
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SueMar
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Tom
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Thank you!
Questions?
Don’t limit yourself!
Paulo Caroli Agile Coach
[email protected]: @paulocaroli