At first glance, metal detectors seem to be a good way to promote the safety of your own products. But is it an essential machine or a “nice to have”? The detectors are used to detect metal pieces e.g. of a sieve in a tablet/capsule that has torn during production and to sort them out. In your risk assessment you should note which case can lead to metal pieces in the end product and how often the case occurs. If the case of a cracked sieve in production occurs every 5 years and a purchase of a metal detector is in the six-digit range, you must consider whether the purchase corresponds to the cost-benefit ratio. If a sieve cracks every year because of a higher production volume, it is more advisable to purchase a metal detector.