Mattias SkarinKanban / Lean coach

Using techniques to improve flow

Sept 14, 2011

Kanban / Lean coachwww.crisp.se

http://blog.crisp.se/mattiasskarinmattias.skarin@crisp.se

The question

Backlog Dev Test Done

[5] [2] [3]

?

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?

Meet Bill

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The owner of

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First action

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+ 25%

417

313

Served ice creams

Before

After

20000

25000

30000

35000

40000

45000

Profit

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� Less dropoff

Noticed Improvement

0

5000

10000

15000

20000

24 25 26

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Letcustomer in

Havea seat

OrderIce

creamEat! Pay

2 min

15s

8 min 10 min 30s 10 min

30s 10min 15s30s 30s

15 min value added time

46 min cycle time= 32%

Process cycle

efficiency

Exit

30s

2min

Serve Ice

cream

?

We’re stressed

Me2! You should hiremore of us!

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46 min cycle time efficiency ?

Letcustomer in

Havea seat

OrderIce

creamEat! Pay

2 min

15s

4 min 10 min

11min 15s30s 2min

15 min value added time= 32%

Process cycle

Exit

30s

Serve Ice

creamPay

Not so stressedanymore!

Serve & EatDeliciousIce cream

Less errors

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46 min cycle time= 32% cycle

efficiency

14 min value added time

31 min cycle time= 45%

Process cycle

efficiency

• Give each waitress a purse withspare change • Put spoons on each table

Suggested Actions

Lead Time - 31%

619

417

Served portions

Before

After

+ 47%+ 47%

41700

61900

30000

40000

50000

60000

70000

Profit

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31

46

Lead Time

Before

After

� Faster flow� Better throughput (portions)� Less stress (waiters)

Noticed Improvements

0

10000

20000

30000

24 25 26 27

Let’s hire part time waitress!

+1

Letcustomer in

Havea seat

OrderAnd Pay

ExitServe & EatDeliciousIce cream

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er inAnd Pay

10 min (!!)

Ice cream

?

Then one day..

[berg av disk..]

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http://magnoliamom.com/?m=201102

Time for a pep talk..

I’m a waitress not a dishwasher!

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Darn!

The problem does not go away..

[berg av disk..]

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http://magnoliamom.com/?m=201102

One day Bob hides behind the shelves..

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Time for a pep talk..

Mmm..

...ok..

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Letcustomer in

Havea seat

OrderAnd Pay

10 min

ExitServe & EatDeliciousIce cream

6 min

27

31

Lead Time

Before

After

- 15%+ 14%

61900

71100

60000

70000

80000

Profit

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27 After

711

619

Served ice creams

Before

After

+ 14%

0

10000

20000

30000

40000

50000

60000

24 25 26 27 28

One problem still exists..

2020

Menu $

Phew! Lesswannabies

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It’s was more expensive thanwe thought

!

Setting up a cone shop

Queue wait time:–20% More icecreams sold:

+15%

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26

27

Lead Time

Before

After

- 4 %

Served ice creams

+ 10%

7110078350

30000

40000

50000

60000

70000

80000

90000

Profit

+ 16%

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829

711

Served ice creams

Before

After0

10000

20000

30000

24 25 26 27 28 29

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Let’s playback – what happened?

Hold back demand until you are ready

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Tools: • Limit WIP• Sprints• Ready checklist

Grouping activities ”all at once”

OrderIce

cream

Pay

I’m quick!

Develop TestReady for test

Develop& test

New Done

Done

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Tools: Cross functional teamsAutomated testingSupplier colocation

Order and pay!

I’m a little bit slower..But quicker than thetwo of you!

& test

Optimize the bottleneck

First rule of bottlenecks:

Then, in order..

Find it

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� Utilize it (Exploit)� Leverage (Subordinate)� Improve (Elevate)

Not treating all demand the same

In devBacklog Done

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Tools:� Train upstream teams� Help them filter demand� Give them tools to do their job well

Three ways to filter your demand

Value demand Failure demand

� What should be here� What shouldn’t be here

”Simplest possible”:

$$$

”Using customer glasses”:

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Value

Product A

Product B

Product C

Product D

Product E

Product F

”By marginal value”

Ideas that

didn’t

work??

Not all flow is golden

50%

60%

70%

80%

90%

100%

Value demand

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0%

10%

20%

30%

40%

Sprint 1 Sprint 2 Sprint 3 Sprint 4 Sprint 5 Sprint 6 Sprint 7

Failure Demand

Average 28 %

Data development team 2009

Why quality matters

Sprint 1 Sprint 2 ...Sprint 3 Sprint 7

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Finding out what to fix first

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3333

OS Dev Database Core

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It is possible ☺☺☺☺

60,00

80,00

100,00

120,00

140,00

Velocity / per manday

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0,00

20,00

40,00

60,00

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Week

Thank you!

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http://www.crisp.se/kanbanhttp://www.limitedwipsociety.org

For further reading about kanban 10 Kanban board samples:

http://blog.crisp.se/mattiasskarin