Tricky. First points of call would be the following for me:
Ask your customer what they were expecting to see
Ask your metal detector supplier what's possible to retrofit
I have to admit it sounds a bit scary that all that happens is a sound and a light comes on. It could be quite easy for an operator to miss it or misidentify the affected pack.
I know! It's really frustrating... And there's nothing much I can do- the company already had this kind of metal detector and we're not in the position of getting a new one (or upgrading current).
Our customers asked to consider fail safes (e.g. search hear failure, detection alarm failure).
I didn't have a chance to contact our metal detector suppliers but Production Manager said he can easily install another light and sound that identifies failures.
Do you think that would be enough? Another thing- how do you prove that we've considered them? Should I just create a log and record any failures? We're short on time (by now) and I still feel lost..
Does anyone else use throat metal detector?