1/ "A plant in which everyone is working all the time is very inefficient" said Goldratt in his landmark book The Goal
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2/ It's easy to see why in a factory, where you need sprint capacity, buffers, slack in the system, all of which require idle time
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3/ But this phenomenon is not unique to production lines. It is true of any system that has dependencies plus statistical fluctuations
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4/ If anything it's even more true of software dev't, which has many more dependencies and wilder fluctuations
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fat and lean are really two meanings/readings of the same ground situation of a system based on explore vs. exploit drives

