see
* http://redsquirrel.com/dave/work/babySteps/
* http://donaldr.noyes.com/ThinkingOutLoud/FirstStepping.htm
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Maybe you are looking for
* SmallSteps
* VerySmallSteps
* MakeTheSmallestChangeThatCouldPossiblyWork
* MovingInTinyCertainSteps 
* RefactoringInVerySmallSteps.