Figure 1

Terminology used in effectiveness studies
| Term | Synonym | Related terms | Definition |
|---|---|---|---|
| effectiveness | Efficacy, efficiency, rationality, profitability, cost- effectiveness, productivity, performance | Optimal, efficient | The ratio of the useful result to the effort incurred to achieve said result. |
| effective | Effectual, rational, economical, profitable, productive, beneficial, cost-effective, resultant | Optimal, best, adequate | Positive (desired) result, but not necessarily the highest effectiveness. |
| optimality | Maximum state, minimum state | Effectiveness, rationality, productivity | Assumes only values above 1 or other than 0. |
| optimal | The best in terms of the criterion adopted | Effective | A state where the objective function reaches an extreme (max. or min.) at given constraints. |
| Social effectiveness | Effectiveness of social production, macroeconomic effectiveness, objective effectiveness, allocation effectiveness, management effectiveness | Economic efficiency | The results obtained are beneficial for the economy as a whole in terms of the expenditure incurred. |
| cost-effectiveness | Management effectiveness | Social effectiveness | Concerns measurable phenomena and processes that can be shaped. |
| Effectiveness of work | Work efficiency, labour intensity | Effectiveness production, entity of | The ratio of the work result to the workload incurred. |