The everyday problem
A negative quantity is a signal to examine the transaction sequence and item mapping. It may arise from a missing receipt, a unit mismatch, the wrong variant or a timing difference. An immediate adjustment can hide the cause.
A workable process
Choose one affected item and identify when its recorded quantity first became negative. Review purchases, sales and other supported movements around that point. Compare document dates, quantities and units with the physical evidence, then use the authorised correction process.
A practical example
A box purchase entered as one piece may be followed by several legitimate piece sales. The negative position is a consequence of the purchase unit, not necessarily missing stock. Correcting the original cause produces a clearer history than repeatedly adding quantities.
Before you finish
Note the investigation and affected documents. Confirm the software's negative-stock controls in your edition, and decide which staff can proceed with or correct exceptions under your business policy.
Try this check with your team
Trace a negative item from its opening quantity through purchases, sales, returns and transfers in date order. Check the exact unit and variant on the first movement that takes it below zero. Compare entry timing with when the goods physically arrived.
What the result tells you
If a purchase is missing, record the actual purchase through the proper process. If the wrong item was selected, correct that source error. A blind positive adjustment can hide both the original mistake and its effect on accounts.
See this workflow in Speed Plus.
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