I went to the lean software and systems conference
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April 28, 2010 Copyright © 2010, Guidewire Software. All Rights Reserved.
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I Went to the Lean Software and Systems Conference in Atlanta
and All I Got Was a Bunch of Thought-Provoking Ideas*
Ted M. YoungDevelopment Manager, [email protected] Software (http://www.guidewire.com)
*And a cool t-shirt
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April 28, 2010 Copyright © 2010, Guidewire Software. All Rights Reserved.
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Twitter Activity at LSSC
• 374 Tweets
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April 28, 2010 Copyright © 2010, Guidewire Software. All Rights Reserved.
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A Lean Background
• System Thinking• Inventory = Risk
• Just-in-Time• Delays Cause Waste (Batching)
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April 28, 2010 Copyright © 2010, Guidewire Software. All Rights Reserved.
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Some Terms
• MMF/MVF• Minimal Marketable Feature• Minimal Viable Feature
• WIP• Work-in-progress
• Kanban 看板 • Sign board
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April 28, 2010 Copyright © 2010, Guidewire Software. All Rights Reserved.
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Lean Focus
• Value > Flow > Waste
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April 28, 2010 Copyright © 2010, Guidewire Software. All Rights Reserved.
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Four Big Ideas
1. Small Slices are Best2. Make Work Visible3. WIP Limits and Flow4. Lean = Whole System
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April 28, 2010 Copyright © 2010, Guidewire Software. All Rights Reserved.
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Small Slices are Best
• Estimates are waste
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April 28, 2010 Copyright © 2010, Guidewire Software. All Rights Reserved.
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Make Work Visible
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April 28, 2010 Copyright © 2010, Guidewire Software. All Rights Reserved.
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Make Work Visible
• Can't improve what you can't see• Exposes knowledge
• Makes implicit -> explicit
• Metrics provide Guidance• What's right?• What's wrong?
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April 28, 2010 Copyright © 2010, Guidewire Software. All Rights Reserved.
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Measurements
• Lead Time• Request to Delivery
• Cycle Time• Work Begins to Work Ready to Deliver
• Throughput• Little's Law for Queuing Theory
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April 28, 2010 Copyright © 2010, Guidewire Software. All Rights Reserved.
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Theory of Constraints
• Cause of Delays• Long feedback cycle• Building unnecessary features • Overbuilding features
• Result of Delays• Finding bugs gets harder
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April 28, 2010 Copyright © 2010, Guidewire Software. All Rights Reserved.
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Queue & WIP Limits
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April 28, 2010 Copyright © 2010, Guidewire Software. All Rights Reserved.
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Queue & WIP Limits
• Limit Queue Size• Forces Bottlenecks Upstream
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April 28, 2010 Copyright © 2010, Guidewire Software. All Rights Reserved.
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Goal: Single-Piece Flow
• Work ONE thing to completion• "Swarming"
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April 28, 2010 Copyright © 2010, Guidewire Software. All Rights Reserved.
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What about Iterations?
• Artificial boundary?• How about Feature-based (MFV)?
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April 28, 2010 Copyright © 2010, Guidewire Software. All Rights Reserved.
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Support/Service Provider
• Multiple Classes of Service (QoS)• Normal• Expedited
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April 28, 2010 Copyright © 2010, Guidewire Software. All Rights Reserved.
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Lean = Whole System
• Allocate capacity strategically• Delivering Value to Customers• Solving Problems• Sustainability• Support
• Optimize for the Whole System• More features faster doesn't mean
improved sales
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April 28, 2010 Copyright © 2010, Guidewire Software. All Rights Reserved.
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Not The End
• But I'll Take Questions…
• My “tweet stream”:• http://www.scribblelive.com/Event/
LeanSSC_2010?Page=0