The MRP whitepaper (which is excellent by the way) has the following diagram
But the paper doesn’t address which calendar is used for counting days. From my testing, it appears that MRP uses (regular) calendar days when looking at consolidating production orders. When looking at consolidating production orders:
Best answer by andrestamour43
View originalDays of supply consolidates based on regular calendar days and is not dependent on a calendar, so this includes weekends holidays, etc. The reason for this is that days of supply can consolidate any type of demand not just production.
Please let me know if you have additional questions.
Is the end goal / problem really to consolidate based on shop days or is it really to reduce the number of times a part is produced? If we can reframe the problem then the possible solutions open up to include minimum order quantity and re-order points.
I hope this helps, I know it is not directly achieving the goal of consolidating based on shop days - maybe someone else has some thoughts.
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