A compendium of the best methods for reducing complexity, variation, confusion, and the other root causes of defects, this book elucidates a powerful mistake-proofing tool that focuses on preventing rather than detecting defects. Even more importantly, Hinckley's mistake-proofing documentation forms helps readers adapt this methodology to their defect prevention efforts. Because mistake-proofing is a skill that improves through familiarity with previous solutions, Hinckley's new classification systems is the key to rapidly finding outstanding solutions to current problems on the shop floor.