Evaluation, audit, research
| Evaluation | Audit | Research | |
| Aim | Evaluate quality of current practice | Measure current practice against agreed standards | Generate new knowledge |
| Initiated by | Service provider | Service provider | Researcher |
| Involves new treatment | No | No | Sometimes |
| Randomisation | No | No | Sometimes |
| Allocate participants to different groups/treatments | No | No | Sometimes |