We have various parts that have multiple manufacturers, with multiple manufacturer part numbers.
We assign an internal part number (“DPN”).
So, for example, for our part number DPN100, it could be made by ManufacturerA with part number MA100, MA101, MA102; ManufacturerB with part number MB786, MB787, MB889, and Manufacturer C with part number ZZZX1.
These are often little tiny things like electrolytic capacitors for which various different capacitors will all be within spec. Due to outages, shortages, and shipping delays, which are all very frequent in this industry, it is necessary to be flexible and able to build one of our products at a moment’s notice from what we have on hand…and to be able to keep these things straight when we are ordering parts to have on hand.