When considering the difference between being efficient and being productive, I tend to go back to the rectangles. The ideal situation is to have an overall balance between what is produced and what is needed, which I’ll call demand. This is even true in constraint-based production such as when using constraint-based scheduling. The demand for each step should be designed around the needs of the constraints; hence, this demand may not be based and timed solely on the needs of a non-constraint resource. For instance, if I sign checks at 60 per hour and you can print them at 60 per minute, your demand may not be hourly based. Your demand may be determined to be 120 in two minutes so that you keep me busy for two hours and then move ...
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