This is a set of 4 books to learn about medical safety. - Title: Basic Knowledge and Application Examples of RCA, 2nd Edition - Title: Basic Knowledge and Application Examples of FMEA, 3rd Edition - Title: Basic Knowledge and Application Examples of Creating Business Process (Flow) Diagrams - Title: Basic Knowledge and Application Examples of Creating Cause-and-Effect Diagrams - Author: Shuhei Iida - Publisher: Japanese Standards Association Thank you for viewing. The items are used and personally managed. Please refrain from purchasing if you are looking for perfection or are overly sensitive. For packaging, I will use paper bags, cardboard boxes, cushioning materials, and wrapping paper that I have at home. I will reuse these materials, but I will do my best to pack them carefully so they don't look messy. Thank you for your understanding. Of course, if that doesn't work, I will use commercially available materials.