非効率

1. Origins, structure, and basic meaning

• Structure: 非効率 is read as ひこうりつ and is a noun and na-adjective for inefficiency, where the result is poor relative to the time or effort used.
• Basic usage: Repeated data entry being inefficient appears in 入力するのは非効率だ, while an inefficient procedure appears in 非効率な手順.

2. Common pitfalls and similar expressions

• Predicate and noun-modifying forms
  • Use 非効率だ as a predicate and 非効率な before a noun.
• Difference from 無駄
  • Unlike the broad word for something useless or wasteful, this term focuses on a poor relationship between input and results.