There are many books available covering the Training Within Industry (TWI) programs, but few include any unique material on adaptation or modification. This dearth of new has caused practitioners to alter the programs without understanding the underlying principles. These changes have made the programs less effective. One must, however, maintain the principles used in the programs when changing the delivery of the programs to suit the culture. The purpose of The TWI Facilitator's Guide: How to Use the TWI Programs Successfully is to prevent the TWI programs from falling into misuse and disuse. This book will explain the main principles of the TWI programs and what they can accomplish, but it will also stress what they are not. This book reviews what the programs are and then explains how to use them. It tells why we do certain aspects of each program. When we know why we do something, we won't stop doing it for the wrong reason.