Reducing costs is an option to consider if evaluation costs outweigh the predicted benefits or available resources. There are a number of strategies for reducing costs by modifying the evaluation design. Consider these options carefully because most of them involve threats to the validity of the evaluation findings and recommendations.
Evaluation expenses are highly situational and there are no magic formulas for calculating costs. After developing the budget matrix to identify what needs to be costed, the next step is to calculate the costs of individual expenses and sum them to obtain the total cost of the evaluation. When determining the resources needed to carry out the evaluation effectively take into account time, money, and expertise.