System Improvements, Inc., 1999. Book is in acceptable condition with some minor wear to the cover and dirt on some interior pages also includes Taproot: The System for Root Cause Analysis, Problem Investigation & Proactive Improvement as a bonus book.
Pearson, 2011. 11th Edition. Hardcover: 432 pages. Book is in good condition with some wear to the cover including several stickers from previous owner as well as some underlining and highlighting throughout the title, previous owners name is written on the first page.