Which principle emphasizes reducing waste within a process?

The principle that emphasizes reducing waste within a process is Lean. Lean methodology is specifically designed to streamline processes by eliminating non-value-added activities, which is often described as waste. The core idea is to enhance efficiency and improve overall productivity by making sure that every step in a process adds value to the final product or service.

Lean principles focus on various aspects, such as optimizing workflows, reducing cycle times, and ensuring that resources are used effectively. By identifying waste and implementing systematic changes, organizations can create a more efficient work environment.

While DMAIC, PDSA, and Six Sigma are also related to process improvement, their primary focus extends beyond waste reduction. DMAIC is part of the Six Sigma framework used for problem-solving and process improvement, addressing variations and defects. PDSA (Plan-Do-Study-Act) is an iterative, four-step management method used for continuous improvement of a process or product. Six Sigma aims for overall process improvement and reducing defects, but it encompasses a broader range of statistical tools and methodologies rather than focusing solely on waste.

In summary, Lean's specific goal to minimize waste distinguishes it as the correct answer in this context.