Lean manufacturing or lean production, or often just “lean,” is a systematic method for the elimination of waste (Muda) within a process system. Lean considers waste created through overburden (Muri) and waste created through uneven workloads (Mura). Lean typically follows a bottoms-up organizational improvement strategy where goals, projects, and tasks are informed largely by employee feedback. Six Sigma is a disciplined, data-driven approach and methodology for eliminating variation and defects (driving toward six standard deviations between the mean and the nearest specification limit) in
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