The document discusses the science behind kanban and lean principles. It covers topics like complex vs. complicated systems, queuing theory, feedback loops, risk reduction, and the golden circle. Kanban focuses on limiting work in progress to improve flow while respecting people and processes. The goal is to build the right things in the right way and measure outcomes.

1. The Science of Kanban - LKBE11 04 Oct 2011
The Science of Kanban
kscotland@rallydev.com
http://availagility.co.uk
twitter.com/kjscotland
KARL
SCOTLAND
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2. The Science of Kanban - LKBE11 04 Oct 2011
Scientific Management
Study
Learn Share
System
Sense Limit
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3. The Science of Kanban - LKBE11 04 Oct 2011
Complex Complicated
• Retrospectively Coherent • Potentially Knowable
• Cause-Effect not repeatable • Cause-Effect separated in time
• Probe → Sense → Respond & space
• Sense → Analyse → Respond
Unordered Domains
Ordered Domains
Disorder
Chaos Simple
• Incoherent • Known
• Cause-Effect not perceivable • Cause-Effect perceivable,
• Act → Sense → Respond predictable, repeatable
• Sense → Categorise → Respond
http://www.cognitive-edge.com/
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4. The Science of Kanban - LKBE11 04 Oct 2011
People
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5. The Science of Kanban - LKBE11 04 Oct 2011
Clark & Wheelwright: Managing New Product and Process Development
100
80
Percent
60
40
20
0
1
2
3
4
5
Number of Simultaneous Projects
Working Time Context Switching Time
Gerald Weinberg, Quality Software Management: Systems Thinking
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6. The Science of Kanban - LKBE11 04 Oct 2011
Single Loop Learning
Strategies &
Assumptions Results
Techniques
Double Loop Learning
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7. The Science of Kanban - LKBE11 04 Oct 2011
Process
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8. The Science of Kanban - LKBE11 04 Oct 2011
Queuing Capacity Utilisation
Lead Time = Queue Size / Processing Rate
Queue
Utilisation
Flow = Speed x Density
Density Flow
Vehicles Vehicles
per per
Hour Mile
Miles
per
Hour
Speed
Miles per Hour
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9. The Science of Kanban - LKBE11 04 Oct 2011
Difference
Temperature
Adjustment
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10. The Science of Kanban - LKBE11 04 Oct 2011
Economics
Life Cycle Profits
Discounted Cash
Time
Maximum
Cash
Injection
Needed
Investment Period Payback Period Profit Period
Self-funding Break-even
Point Point
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11. The Science of Kanban - LKBE11 04 Oct 2011
Cost Standard
Expedite
Time
Cost of Delay
Fixed
Date Intangible
Information Theory
Information
0% Probability of Failure 100%
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12. The Science of Kanban - LKBE11 04 Oct 2011
Ideas
Learn Build
Data Code
Measure
Risk Reduction
Sequence Early
Value of Risk Reduction
Sequence Late
Cost of Risk Reduction
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13. The Science of Kanban - LKBE11 04 Oct 2011
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14. The Science of Kanban - LKBE11 04 Oct 2011
Plan
Act Do
Check
Observe
Act Orient
Decide
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15. The Science of Kanban - LKBE11 04 Oct 2011
The Golden
Circle What
How
Why
http://www.startwithwhy.com/
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16. The Science of Kanban - LKBE11 04 Oct 2011
Economics
Lean
People Process
Books
• Kanban – David J. Anderson
• The Principles of Product Development
Flow – Donald G. Reinertsen
• Brain Rules – John Medina
• Software by Numbers – Mark Denne &
Jane Cleland-Huang
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17. The Science of Kanban - LKBE11 04 Oct 2011
Thank you!
Email: kscotland@rallydev.com
Twitter: http://twitter.com/kjscotland
Blog: http://availagility.co.uk
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