What question did this study set out to answer?

The aim is to evaluate Lean Six Sigma's effectiveness in improving production efficiency in plasticizing machine manufacturing.

Lean six sigma application for enhancing production efficiency in plasticizing machines manufacturing: a metalworking industry case study

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Randomized trial applies Lean Six Sigma to enhance production efficiency in metalworking, suggesting a low-cost optimization approach.

The aim is to evaluate Lean Six Sigma's effectiveness in improving production efficiency in plasticizing machine manufacturing.
Applied DMAIC cycle — Define, Measure, Analyze, Improve, Control.
Used tools such as Value Stream Mapping, Pareto Charts, 5S, and Poka Yoke.
Diagnosed process waste and implemented improvement actions in a metalworking company.
37% reduction in manufacturing lead time, decreasing from 67 to 42 days.
Production capacity increased by 60%.
Economic feasibility with an Internal Rate of Return of 30.24%.

Campoverde-Pillajo et al. (2026) studied this question.

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