What to change
Agree when validation should run for each field, separating useful immediate guidance from messages that should wait until entry is complete.
A worked example
Illustrative example
Typing the first letters of an email address does not trigger repeated rejection. A useful message appears when the visitor leaves an incomplete answer.
How to check the result
Accept when validation arrives at a helpful moment, updates after correction and avoids repeatedly interrupting unfinished input.
A mistake to avoid
Delaying all feedback until the final screen can also create unnecessary work; choose timing according to the particular question.
Your action checklist
Use these checks to prepare a discussion with your team or supplier. Tick a check when you have recorded the decision or evidence, rather than when a feature has simply been promised.
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Further reading
These primary sources provide additional context for the project decisions above.
Related decisions
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