In software development waste is to strip out anything that does not add value to the customer to gain speed. In order to eliminate waste, you must first be able to recognize it.

* Uncoded Documentation
* Unsynchronized Code
* Untested Code
* Undocumented Code
* Undeployed Code

Poppendieck, Mary and Tom. Implementing Lean Software Development: From Concept to Cash. Addison-Wesley, 2006.

* Short feedback cycle
* You Ain't Gonna Need It (YAGNI)

The cheapest, fastest, and most reliable components of a computer system are those that aren't there. - Gordon Bell

* Handoffs, delays, and task switching
* Knowledge base
* Refactoring
* Team-based problem solving
* Continuous improvement

* Reduce hand-offs & work together
* Cross-functional teams
* Face-to-face
* Document knowledge

* Co-location
* Face-to-face
* Short timeboxed iterations
* Deliver value to the customer
* Regular feedback

* Minimize context switch
* Eliminate the unimportant!

* Automated tests (unit/regression)
* Test driven development (TDD)
* Continuous integration system