A.3.3.PI:8 - Common Anti-Patterns and How to Avoid Them

Failure	Why it matters	Repair
Use an aggregate as a predictive state without comparing its merged cases	Components or hidden modes can produce different continuations.	Compare those cases and retain their relevant distinction or output range.
Substitute a long-run average for a history-conditioned forecast	A decision about the next event can depend on recent observations.	Condition on the available history or retain its predictive distribution.
Turn a recovered value into a measurement without carrying its assumptions	Algebraic reconstruction can amplify errors and depends on the supplied law.	Propagate the reading uncertainty and inspect the admitted domain.
Repeat a one-step predictor beyond its supported use	Prediction error can accumulate, or the retained output may lack its own update.	Construct an adequate state update or a predictor for the required horizon.
Keep a longer history without the intervening inputs	Similar observations can follow different actions and call for different forecasts.	Retain the actions that enter the transition account.
Obtain a full hidden-state estimate after a bound has settled the question	The extra work adds cost without changing the present choice.	Use the bound and reopen the distinction when another question needs it.