Conformity with user expectations is one of the principles for designing user-friendly interactive systems (interaction principles) from the DIN EN ISO 9241-110 standard.

It describes the extent to which interaction with a product reflects what users have expected. If the user experience does not meet the expectation, this can lead to problems during the interaction. In the worst case, errors occur that cannot be undone.

For example, if the form fields are not displayed in the expected order when entering an address, it takes longer to orient oneself or errors are made when entering data.