Nice video and good information sir..need continue videos regarding new lab setup like equipment qualification documents etc..mainly about microbiology
If they don't assign expiry that means you need to retest retest it periodically. May be once in year and continue max up to 5 yrs. You can also ask vendor to provide stability data and based on that you can assign expiry as explained in this video
Initially you can start with sampling and testing Swab and Rinse for each equipment after every product changeover. Once you have sufficient products then you can go for cleaning validation. May be after 5 - 10 products
For Market Complaint - great tool to identify Root caused via Fishbone/Ishikawa/Cause & Effect Diagram - This video was provide holistic approach finding Root caused Analysis. ❤