Qualitative data is a more difficult measurement of programme success. It includes assessments of problems encountered, stakeholder satisfaction, and unanticipated benefits. Qualitative data can give a real understanding of the actual impact the actions are making on people’s lives. It is usually collected through instruments such as surveys and personal interviews. In order to have a better understanding of the successes and challenges, it is advisable to collect both types of data. For example, to address persistent water shortages, a town may decide to implement a pilot water conservation programme to install low-flow showerheads in residences. A quantitative data collection effort would focus on how much water has actually been saved, while qualitative data would reveal how satisfied consumers were with the performance of the new showerheads. Both types of information are imperative to determine whether the program was successful.