This document discusses the strengths and limitations of using dietary diversity indicators to measure the impact of agricultural projects on diet quality. Dietary diversity is defined as the number of different foods or food groups consumed over a given period of time. It is considered a proxy for micronutrient adequacy and diet quality. The document outlines key questions project planners should consider when deciding whether and how to measure diet quality. It also reviews evidence that greater dietary diversity is associated with better micronutrient status and health outcomes in various populations. However, limitations include day-to-day variability, lack of consensus on indicators for adults, and that household-level indicators may not reflect diet quality of vulnerable groups.