A.3.3.PI:9 - Consequences
The reader can simplify a predictive account while preserving the relevant future distinction, recover missing information from history, or act using a useful bound. The construction also makes visible why a changed horizon, law or observation scheme can require a different description.
The result is relative to its supplied model, observations and use. More retained information can increase storage, estimation and computational cost, and reconstructed quantities can be sensitive to measurement error.