The only time I find it necessary to use DS is when we have generic part numbers for items that do not have an OE number that usually have no cost, so the plus/minus value is a moot point.
Have not found any purpose for the PS function.
For example, part number FRT, which we use for overnight freight charges. We don’t normally have an OH, which goes to a negative OH when charged out. Using DS to bring OH back to zero.
The only other exception that IMHO is necessary would be when performing ‘routine’ physical counts of the fast moving oil filters or the like, which have a tendency to be improperly charged out on occasion. Whether or not corrections warrant DS adjustments is a judgement call based on the discrepancy.
When we have discrepancies, THERE’S ALWAYS A REASON. If the proper receipting of emergency purchases, WD purchases and regular orders are input properly, along with properly charging out parts and doing MSR returns THE RIGHT WAY, the need to manually adjust inventory should be minimal.