ASTAM: Written explanations should identify the assumption being tested
For applied work, “the result is reasonable” is not enough. State which diagnostic or assumption supports that judgment. A short answer can be specific without reciting every formula on the syllabus.
Worked example or practice scenario
Suppose a reserve estimate falls while claim counts rise. A useful check separates frequency, average severity, payment timing and case-reserve practice. Merely saying that more claims imply a higher reserve misses the timing and size of those claims.
Try this next
Practise a three-part explanation: observation, possible mechanism, check that could distinguish it from another mechanism. Match your practice format to the current official instructions and sample materials. Do not share or seek confidential assessment content.
Reading sources
ActNet editorial guide · October 1, 2026 · Original illustrative examples.