The signals that actually mean something
Physical stock and recorded stock regularly disagree. If a stock count and the number in your register or spreadsheet do not match more often than they should, the recording process — not the counting — is usually the problem.
Sales commits material that production has already allocated. This happens when sales and production keep separate records with no shared view of what is actually available.
Month-end reporting takes days to assemble by hand. If someone spends real time each month copying numbers from several places into one report, that time is the cost of not having a system.
Tracing a dispatched item back to its production batch means searching handwritten records. This matters most when quality issues or customer queries need a fast, confident answer.
When it is not yet worth it
A single-product operation with low order volume and one location often runs fine on a well-organised spreadsheet and basic accounting software. The workaround cost has to exceed the cost of building and maintaining a system — for a small, simple operation, it frequently does not yet.
What a realistic first step looks like
Most manufacturers do not need every module on day one. We usually start with whichever single module hurts most — inventory, or production and dispatch — and go live with that before adding the next.