C.29.BB:4.5 - Use uncertainty or discrepancy to choose the next move

Substitute the available amounts and compute the requested consequence. If some terms are bounded, propagate the bounds through the signed sum. Preserve dependencies when independently combining endpoints would admit impossible combinations.

For observed values, define the discrepancy as observed change minus the change predicted by the included terms. A nonzero discrepancy establishes disagreement between those accounts. Its cause can lie in an omitted store or transfer, incompatible timing or units, a faulty observation, or an inadequate law. Use the working situation to choose a discriminating next observation or model change.

Resolve a remaining term only when it can change the answer enough to justify the work. A supported bound that settles the current decision is already a usable result. An unresolved cause can remain open when the decision tolerates the resulting uncertainty.