The decision
Confirm what the test environment represents and which important cases it cannot model. Keep limitations visible in the acceptance plan instead of assuming a sandbox proves every production behaviour.
Rehearse this before accepting the change
Submit an incomplete fictional record that should be rejected by the receiving rules.
Use fictional examples and an authorised test environment. Record what happened, the evidence you inspected and any issue that still needs a responsible owner.
Choose a useful measure
Count acceptance assumptions not exercised by available testing.
Agree the definition and baseline with the team doing the work. Review the result over a comparable period and note other changes that could affect it.



Your planning worksheet
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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