#3 – Assume variability; preserve options
Generate alternative system-level designs and subsystem concepts. Rather than try to pick an early winner, aggressively eliminate alternatives. The designs that survive are your most robust alternatives.
—Allen C. Ward, Lean Product and Process Development
Systems builders tend to have a natural inclination to try to reduce variability. It just seems that the more you think you know and have already decided, the further along you are. But this is often not the case. While it is true that variability can lead to bad outcomes, the opposite case can also be true. Variability is not inherently bad or good. ...
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