Time is a critical factor in sorting out problems practically.In terms of the quality system as deviations, complaints, and CAPAs, the author had to look up many different sources to find possible answers. Understanding the incident and seeing the issue plays a crucial role in sorting it out and is half of the way. Following the problem diagnose the book will guide the user to the possible cause(s). Reaching out to the possible causes, the reader can find the one which fits more to the specified case and following that can see the suggested solution for it. The author designed the book as simple as possible and preferred avoiding providing formal reading texts to prevent losing track in sorting the issue.Since the author prepared the present document for many levels’ audience, hence it is suitable to understand and use from technician operators to drug formulation designers.