Strain or overburden.

• A. Mura
• B. Muri
• C. Nesting
• D. Package-2-Order

Answer: (B)

Strain or overburden is described in lean terms as Muri. Muri means forcing people or equipment to work beyond their capacity—too much pace, too little rest, or unrealistic workloads. This happens when the process design is flawed, workloads aren’t balanced, or variability isn’t smoothed, and it leads to fatigue, mistakes, and equipment wear or breakdowns. Understanding this helps you see why leveling the workload, standardizing work, and designing processes around actual capacity are essential. Mura, by contrast, is the unevenness or variability in the process that creates those peaks in workload. Nesting is about arranging parts to minimize waste in cutting or packing, not about burden on people or machines. Package-2-Order isn’t a term used to describe strain. So the concept that best matches strain or overburden is Muri.