Shigeo Shingo, a Japanese Industrial Engineer, contributed many concepts to modern Management and Manufacturing practices. Some of these included the creation of:
Zero Quality Control �Shipping No defects�
Sequence Inspection �Checking previous work, Prior to starting your task�
Source Inspection �Checking ones own work�
Poka Yoke �Mistake Proofing�
SMED (Single Minute Exchanges of Dies)
Although he did not create the concepts of Sequence and Source Inspection, Shingo developed a structure of knowing which to use when.