01
After finding a difference, examine the comparison.
A different value in an earlier and a current record identifies a candidate change. Next, check that they describe the same subject, identify when each record applies, and examine whether their units, calculation basis, and conditions are comparable. A corrected record, new unit, or revised scope needs to be distinguished from a change in the underlying situation.
Subjects, relationships, and time provide that context. Understanding what each record described and where the new record changes it helps turn a numerical difference into a meaningful examination of the situation.
02
Hand verified differences on to the situation picture.
A change in one subject may matter to a dependent schedule or an assumption in earlier analysis. Following those connections helps identify what to check again. A connection alone does not establish that every related item is affected in the same way.
HARBINGER records the verified difference with its evidence, counter-signals, and unknown conditions. PÓLYA weaves what that difference means for related subjects and plans into the situation picture; people choose the interpretation.
03
Reassessment does not erase the earlier explanation.
When new material changes an analysis, the sources and assumptions behind the previous explanation remain relevant. Keeping the earlier state alongside changed conditions makes it possible to understand why a review was reopened.
Verifying a difference identifies what deserves attention and provides evidence that could alter a judgment. The responsible person decides whether to retain or change that judgment. Discovering a change does not automatically alter an existing human decision or authorization.