1) Qc inspection : Qc Inspector will check document / drawings periodically. --> This is not system action. Cannot prevent the no inspection in future. Do you set system for inspection record?, when, where to record?, who will keep the record, what item is required to be inspected each time. Need to set as system to ensure QC will know their responsiblity when and where to record and what item is required to be inspected. Actions to ensure no recurrance of similar problem in the next cases.
But If you already have system, records, specified items to check, need to ask why no implementation maintained. (and identify this as Root causein cloumn Q) and identify corrective action in this column again.