Decision Periods

The Engine stores details on CaseDecision and its child tables whenever there is a "change" in eligibility and/or entitlement over the lifetime of a case. In other words, the Engine splits a determination into "decision periods" of constant eligibility/entitlement, and stores each of those period as a row on CaseDecision (and links those rows back to the CREOLECaseDetermination).

The CER rule objects for eligibility and entitled objectives/tags contain a mixture of fixed data and data which changes over time. For the sake of clarity, this section describes each of the types of data changes which the Engine considers a "change" in eligibility and/or entitlement:

• Each date on which the eligibility result changes;
• Each date on which the set of attained objectives changes; or
• Each date on which any of these values change for an attained objective:
  • The target for the objective;
  • The related reference for the objective; and/or
  • The value of any type of tag for the objective.

Each change to any of the above will result in a CaseDecision record (plus child records) for that period during a determination.