Which methodology focuses on improving quality in operations by eliminating defects?

The methodology that focuses on improving quality in operations by eliminating defects is Six Sigma. This approach employs a set of tools and techniques designed to improve processes by identifying and removing sources of variation and minimizing defects. Its goal is to reach a level of quality where the probability of a defect occurring is extremely low, specifically aiming for no more than 3.4 defects per million opportunities.

Six Sigma utilizes statistical analysis to measure performance, understand process capabilities, and enhance overall quality. This data-driven approach empowers organizations to make informed decisions based on concrete evidence rather than assumptions or subjective observations.

While Lean Manufacturing aims to enhance efficiency by minimizing waste and optimizing processes, and Kaizen focuses on continuous, incremental improvements, Six Sigma's primary emphasis is specifically on quality enhancement through defect reduction. Just-in-Time (JIT) focuses on reducing inventory and ensuring materials arrive exactly when needed, without directly addressing quality defects. Thus, Six Sigma stands out for its concentrated focus on quality improvements by systematically eliminating defects.