The timing of the measurements must be planned. Frequent measurements increasethe accuracy of the results – but also the amount of work. The following table shows when what type of measurement is needed, what they are suited to, and how widely used they are in practice.
Planning the timing and frequency of measurements
Merely describing a situation says as little about the effects as traditional target/performance comparison. If it is to be possible to make statements about the effects of a project or programme, then the situation achieved by the target group must be related to its initial situation or to a control group. The combination of the two is sometimes described as the ‘gold standard’ of impact assessment. The following table gives an overview of which comparisons are possible and what they are suited to.