効率

1. Origins, structure, and basic meaning

• Structure: 効率 is read as こうりつ and is efficiency, how effectively results are produced relative to time, effort, or resources used.
• Basic usage: Use 作業の効率が上がる for work efficiency improving and 効率と安全性を比べる for comparing efficiency with safety across two methods.

2. Common pitfalls and similar expressions

• Distinction between 効率 and 効果
  • The headword concerns the relation between input and output, while the comparison term denotes the effect or result actually produced by an action.