A checklist is predefined set of guidelines, tasks, or other items against which products, processes, behaviors, user interface components, or something else, are compared.

Checklists are often condensations of voluminous style guides, detailed procedural guides, or other core source documents. Checklists can be used to verify proper procedures, compare designs to standards or guidelines, or evaluate a product. Advantages of checklists include reduced memory load, reduced errors, and reduced workload.