Seven deadly wastes
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There are seven things that slow your software team down. Learning to conquer each of them is the key delivering faster. Originating in the Japanese manufacturing industry in the middle of the 20th century, the ideas behind the seven wastes are still hugely relevant to software development today. I explained each one and how it slows you down, then explained how you can defeat the seven wastes and deliver faster than ever before.
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Seven deadly wastes
- 2. Jez Halford Software Development Consultant I help software teams to go faster @jezhalford jezhalford.com medium.com/@jezhalford
- 3. What slows you down?
- 4. 無駄 Muda
- 7. •TRANSPORT•
- 8. 1 “Transport” ● Handovers between teams or developers ● Bouncing back and forth between Dev and QA teams ● Deploying to different environments Movement of the work
- 9. 1 “Transport” ● Pairing and collaboration ● Continuous Integration ● AutomationMovement of the work
- 11. •INVENTORY•
- 12. 2 “Inventory” ● Abandoned Work ● Work In Progress ● Working on several things at once Undelivered work
- 13. 2 “Inventory” ● Reduce your lead time ○ Feature toggles ○ Smaller deliverable units ○ Branch by abstraction ● Visualise your work in progress ● Stop starting and start finishing Undelivered work
- 16. •MOTION•
- 17. 3 “Motion” ● Task switching ● Irregular meetings ● Hot desking ● Building new environments Movement of people around the work
- 18. “Motion” ● Reducing inventory also reduces motion ● Get Rhythm! Movement of people around the work
- 20. •WAITING•
- 21. 4 “Waiting” ● Waiting for other teams ● Waiting for outside input ● Waiting for clarificationDelays in delivering the work
- 22. 4 “Waiting” ● Consider the whole system ● Take ownership ● Talk to peopleDelays in delivering the work
- 25. 5 “Over Processing” ● Gold plating ● Solving imaginary scaling issues ● Writing “libraries” instead of operational code Working too hard
- 26. “Over Processing” ● Deliver often ● Base performance improvements on evidence ● Refactor when you need to Working too hard
- 29. 6 “Over Production” ● 64% of built software features are rarely or never used* ● Every feature has a cost ● Developing useless features is doubly wasteful Doing useless work * From a limited study in 2002 - probably nonsense
- 30. 6 “Over Production” ● Strong product ownership ● Fast feedback ● Remove stuff that isn’t usedDoing useless work
- 32. •DEFECTS•
- 33. 7 “Defects” ● Bugs in production are bad ● Bugs before production are still bad Working on the work
- 34. 7 “Defects” ● Automated tests ● Dev/Prod parity ● Continuous integration ● Shared understanding ○ Example mapping ○ OOPSI ○ BDD Working on the work
- 36. ● Ship small things often ● Automate everything you can ● Work on one thing at a time ● Maintain a regular pace ● Deal with problems and complexity early ● Prioritise working code over perfect code Transport Inventory Motion Waiting Over Processing Over Production Defects