Instrument Designer An indicator names what to measure. An instrument is the tool that produces the data. A rigorous indicator collected through a poorly designed questionnaire yields data that cannot answer the question. This skill prevents that. When to use Trigger for any data-collection tool: structured questionnaire or survey, semi-structured key-informant or in-depth interview guide, focus-group discussion guide, observation checklist, or topic guide. Do not trigger for indicator definition (use indicator-designer) or for analysing collected data (use the data-analysis or qualitative-co…