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The word humility is derived from the Latin word for ground, humus. The notion of ground, earth or dirt makes sense in that humility is a virtue that keeps a person from reaching beyond himself or herself.
Model lines (a.k.a. pilot) are a proven method to initiate a lean launch. The model, typically one specific "line" or value stream within a single facility or operation, provides a small, focused and controlled playground for implementing lean.
Taiichi Ohno preferred facts over data, meaning, among other things, that direct observation trumps second hand stuff. How else can you truly grasp the current situation and identify the waste?