What is the lowest production level at which costs are minimized?

• A. Economies of Scale
• B. Minimum Efficient Scale
• C. Flexible Manufacturing
• D. Mass Customization

Answer: (B)

The key idea is the minimum efficient scale, which is the smallest level of output at which a plant’s long-run average total cost stops falling and is minimized. Below this level, you’re not fully exploiting the plant’s capacity, so costs per unit stay higher. Reaching the minimum efficient scale means you’re producing enough to achieve the lowest possible average cost given the production technology and scale.

Economies of scale describes the general cost advantages that come from increasing output, but it doesn’t specify a particular production level where costs are minimized. Flexible manufacturing is about the ability to quickly switch production, and mass customization combines customization with efficiency; neither identifies the precise output level at which costs are minimized.