Lean and Kanban Principles for Software Developers

LEAN, KANBAN, AGILE @cory_foy | Cory Foy | http://coryfoy.com

Kanban

Waterfall

Waterfall Requirements

Waterfall Requirements Design

Waterfall Requirements Design Development

Waterfall Requirements Design Development Test

Waterfall Requirements Design Development Test Credit: http://www.ﬂickr.com/photos/tonymangan/611780383

Agile Waterfall Agile 70 52.5 35 17.5 0 Q1 Q2 Q3 Q4 Q5 Q6

Scrum Ideal Actual 100 75 50 25 0 1 2 3 4 5 6 7 8 9 10

Productivity

Credit: http://www.ﬂickr.com/photos/shellysblogger/2464975037/

Developer

Lines of Code Developer

More Lines of Code Developer

Goodness More Lines of Code Developer

Goodness More Lines of Code Great Developer

Tester

Bugs Found Tester

More Bugs Found Tester

More Bugs Found More Goodness Tester

More Bugs Found More Goodness Awesome Tester

Company

Sales Company

More Lines of Code Sales Company

More Bugs Sales Company

More Sales Company

More Sales More Money Company

More Sales More Money Happy Customers Company

More Sales More Money Happy Customers Happy Company

More Sales More Money Happy Customers Happy Company Happy Developers

Waiting Development Test Feature 1 64-Bit Priority Bug 2 Testing Bug 17 Feature 11 Priority Bug 7 Feature 18 Bug 4 Feature 42

Waiting Development Test 64-Bit Testing Feature 1 Priority Bug 7 Priority Bug 2 Feature 18 Bug 17 Feature 11 Bug 4 Feature 42

Waiting Development Test Priority Bug 7 64-Bit Feature 18 Testing Bug 4 Feature 42 Feature 1 Priority Bug 2 Bug 17 Feature 11

Capacity

Waiting [8] Dev [4] Test [2] Feature 1 64-Bit Priority Bug 2 Testing Bug 17 Feature 11 Priority Bug 7 Feature 18 Bug 4 Feature 42

Waiting [8] Dev [4] Test [2] 64-Bit Priority Bug 2 Testing Bug 17 Feature 1 Feature 11 Priority Bug 7 Feature 18 Bug 4 Feature 42

Waiting [8] Dev [4] Test [2] Priority Bug 7 64-Bit Priority Bug 2 Testing Bug 17 Feature 1 Feature 11 Feature 18 Bug 4 Feature 42

Seven Principles Eliminate Waste

Seven Principles Amplify Learning

Seven Principles Decide as late as possible

Seven Principles Deliver as fast as possible

Seven Principles Empower the team

Seven Principles Build Integrity In

Seven Principles See the Whole

Theory

Implementation

Four Steps

Understand Your Existing Process

Understand Your Existing Process Value Stream Map

Customer Emails Rep

Customer Enters Bug to Emails Rep Tracker

Customer Enters Bug to Executive Emails Rep Tracker Review

Customer Enters Bug to Executive Emails Rep Tracker Review Assigned Fix in Version

Customer Enters Bug to Executive Emails Rep Tracker Review Assigned Fix Assigned to in Version Dev Team

Customer Enters Bug to Executive Emails Rep Tracker Review Assigned Fix Assigned to Coded in Version Dev Team

Customer Enters Bug to Executive Emails Rep Tracker Review Assigned Fix Assigned to Coded in Version Dev Team Assigned to Test Team

Customer Enters Bug to Executive Emails Rep Tracker Review Assigned Fix Assigned to Coded in Version Dev Team Assigned to Tested Test Team

Customer Enters Bug to Executive Emails Rep Tracker Review Assigned Fix Assigned to Coded in Version Dev Team Assigned to Release Tested Test Team Planning

Customer Enters Bug to Executive Emails Rep Tracker Review Assigned Fix Assigned to Coded in Version Dev Team Assigned to Release Tested Test Team Planning Deploy to Beta Site

Customer Enters Bug to Executive Emails Rep Tracker Review Assigned Fix Assigned to Coded in Version Dev Team Assigned to Release Tested Test Team Planning Deploy to Tested Beta Site

Customer Enters Bug to Executive Emails Rep Tracker Review Assigned Fix Assigned to Coded in Version Dev Team Assigned to Release Tested Test Team Planning Deploy to Deploy to Tested Beta Site Production

Customer 1 Enters Bug to 1-2 Executive Months Emails Rep Week Tracker Review 1 Day Assigned Fix 3 Assigned to 2 Weeks Weeks Coded in Version Dev Team 1 Day Assigned to 1 4 Release Week Tested Weeks Test Team Planning 2 Days Deploy to 1 1 Deploy to Week Tested Week Beta Site Production

Reduce Waste

Reduce Waste Seven Wastes

Reduce Waste -> Seven Wastes Partially Done Work

Reduce Waste -> Seven Wastes Extra Features

Reduce Waste -> Seven Wastes Lost Knowledge

Reduce Waste -> Seven Wastes Handoffs

Reduce Waste -> Seven Wastes Task Switching

Reduce Waste -> Seven Wastes Delays

Reduce Waste -> Seven Wastes Defects

Reduce Waste Write Less Code

Reduce Waste SOLID

Reduce Waste Single Responsibility Principle SOLID

Reduce Waste Single Responsibility Principle SOLID Open-Closed Principle

Reduce Waste Single Responsibility Principle SOLID Open-Closed Principle Liskov Substitution Principle

Reduce Waste Single Responsibility Principle Interface Segregation Principle SOLID Open-Closed Principle Liskov Substitution Principle

Reduce Waste Single Responsibility Principle Interface Segregation Principle SOLID Dependency Inversion Principle Open-Closed Principle Liskov Substitution Principle

Reduce Waste TDD

Reduce Waste TDD Test-Driven Development

Reduce Waste Behavior-Driven Development TDD Test-Driven Development

Reduce Waste Behavior-Driven Development TDD Test-Driven Development Acceptance-Test Driven Development

Reduce Waste Minimal Useful Feature

Reduce Waste Justify Every Feature

Reduce Waste Don’t Automate Complexity

Deliver Fast

Deliver Fast Queuing Theory

Deliver Fast Utilization

Deliver Fast Cycle Time

Make it Visible

Make it Visible Big Visible Wall

Make it Visible Kanban Board

Make it Visible Dashboard

Make it Visible Build Lamp

Be Lean

Be Mean

•Cory Foy •Slides at: http://coryfoy.com •Email: foyc at cory foy dot com •Twitter: @cory_foy

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Lean and Kanban Principles for Software Developers

by Cory Foy on Mar 04, 2010

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Lean and Kanban Principles for Software Developers — Presentation Transcript