実効

1. Origins, structure, and basic meaning

• Structure: 実効 (じっこう) combines actual 実 and effect 効 to denote practical effectiveness.
• Basic usage: It evaluates whether a measure works in practice and whether a system's real impact can be improved.

2. Common pitfalls and similar expressions

• Practical effect rather than formal existence
  • 実効がある asks whether a policy produces results in the field, not merely whether it has been announced or enacted.