What were three key focuses of Shigeo Shingo’s work?

Shigeo Shingo is widely recognized for his contributions to manufacturing and the Toyota Production System, particularly in relation to improving quality and efficiencies through various lean principles. The three key focuses of his work are indeed mistake proofing, zero quality control, and supplier sourcing.

Mistake proofing, also known as "Poka-Yoke," is a methodology developed by Shingo that aims to prevent errors in manufacturing processes. By designing systems that stop errors before they occur, organizations can significantly enhance product quality and reduce costs associated with rework and defects.

Zero quality control represents Shingo's philosophy that the best way to manage quality is to prevent defects from happening in the first place, rather than detecting them after they occur. This proactive approach to quality management not only leads to higher productivity but also fosters a culture of continuous improvement within organizations.

Supplier sourcing, while not as prominently featured as mistake proofing or zero quality control, reflects Shingo's understanding of the importance of collaboration with suppliers to ensure that quality is maintained throughout the supply chain. By fostering strong relationships with suppliers and focusing on quality from the source, organizations can achieve better overall results.

The other choices do not accurately reflect the primary focuses of Shingo's work, as they involve different aspects of business