From your complaint sample that found no product inside the carton.
Tylenol 500 mg (100’s) caplets batch number 501060 performed packing carton by cartoning machine. The process is packing carton by manual operator put the bottle product into carton box which the carton was closed by the machine. After closed carton, operator group 12 boxes into shrink film and wrapping who will count the carton box by visual check and put shrinked carton to shipper which inspected by weight checking
For packing process (see in flow below) that we have 3 points of in-process
control. We have visual checking in STEP 1 to STEP 3 and weight checking in STEP 3.
In case, no bottle product inside the carton was occurred in STEP 1, we cannot
detect by visual checking in STEP 2 and STEP 3 because the bottle product was contained in closed carton box. And the STEP 3, we have weight checking of shipper which the weight can detect no one shrinked pack in the shipper. From the reason, if no bottle was in STEP 1 that we cannot detect the problem that maybe the cause of complaint.