適正

1. Origins, structure, and basic meaning

• Structure: 適正 (てきせい) combines suitability 適 and correctness 正 to denote an appropriate or proper level.
• Basic usage: It evaluates a box's weight and whether staffing matches the workload.

2. Common pitfalls and similar expressions

• Appropriateness depends on conditions
  • Whether something is 適正 depends on purpose, capacity, and safety constraints rather than one universal number.