Hvad er grænserne for en under produktionskontrol?

Under produktionen har kontrol nogle begrænsninger som nedenfor:

1. En under produktionskontrol dækker ikke den gennemsnitlige kvalitet af de endelige produkter. For eksempel, inden for beklædningsindustrien er den sidste proces med produkter at skære trådender, det arrangeres lige inden emballering af produkter. Utrimmede gevindender er en almindelig mindre defekt i den måde, der er arkiveret, men en under produktionskontrol kunne ikke finde dette.
2. Det er ikke nok i sig selv. En fabrik kan identificere nogle problemer, gemme dem væk fra inspektøren, and then ship them out. This is why an inspection during production should be followed by afinal random inspection, to confirm average quality.
3. For sensitive projects, the factory might need some guidance from the beginning of production. This is the work of a technician capable of setting up processes as required.
4. In certain cases production takes place on multiple lines or even in multiple factories. One inspector will not be able to get an idea of average quality in one day… He should stay for longer and monitor both production schedule and quality.
5. Very often labeling and packing cannot be checked properly. Chinese factories tend to receive packing accessories towards the end of production (because there are always amendment for labeling or packing till the end of production).