Manufacturing practices evolved from (A) Craft Production (vast offerings high cost), to produce exactly what the customer wants; to (B) Mass Production (limited varieties low cost), to (C) Lean Manufacturing with reduction of wastes and quality improvement. Toyota Manufacturing Practices focus on Just in Time inventory management, to minimize inventory obsolescence and potential wastes, is this a Push or Pull [ Select ] . Covid had changed the efficiency focus of supply chain to a resiliency model. Some referred this as Predictability Premium. Is cost invariably going to increase [ Select ] Yes or NO. Why [ Select ] In the 1980, Motorola launched Six Sigma, which General Electric adopted this methodology that to improve financial performance. Benchmarking Lean Manufacturing to Six Sigma. The former is Factory-centric or Customer/data-centric [ Select ] ? How about Six Sigma's focus [ Select ]