What is 'Poka-yoke' in Lean manufacturing?

• A. A technique for employee empowerment
• B. A method to increase production speed
• C. A mistake-proofing technique
• D. A tool for employee evaluation

Answer: (C)

'Poka-yoke' is a concept in Lean manufacturing focused on preventing errors or mistakes in processes, which makes it a mistake-proofing technique. The term translates from Japanese as “mistake-proofing” or “error prevention.” This methodology aims to design processes in such a way that human errors are either eliminated or caught before they lead to defects.

By implementing poka-yoke, manufacturers can incorporate simple and inexpensive devices that help operators avoid mistakes or detect them early in the production process. For instance, a design that physically prevents the incorrect assembly of parts or a checklist that ensures essential tasks are completed before moving forward are common applications of this technique.

Utilizing such methods not only improves product quality but also enhances operational efficiency by reducing waste and rework associated with errors. This aligns with the core principles of Lean manufacturing, which prioritize the minimization of waste and improvements in overall process effectiveness.