Suitability for the user's tasks is one of the principles for designing user-friendly interactive systems (interaction principles) from the DIN EN ISO 9241-110 standard.

A product is suitable for the user's tasks if it supports users in completing their tasks. This is the case, for example, when the relevant interaction elements are always placed in the foreground in different steps of a process. Unnecessary interactions should be minimized and, at best, completely avoided.