 Admissible decision rule

A decision rule is admissible if no other rule has risk function no greater at every parameter and strictly smaller at one parameter. Parameter estimation is one decision problem; its admissible rules are admissible estimators.

In decision theory, an **admissible decision rule** refers to a decision-making strategy that is considered acceptable or valid under certain conditions. Specifically, admissibility typically refers to a rule that cannot be improved upon by any other rule with respect to a specific criterion of performance.