Engineering Program Number Status code definition. Definition Phase: U - Undefined (awaiting decision to prepare), I - Integration (documentation in process), D - Functional (documentation in process), P - Proposed (complete and out for estimates); Execution Phase: E - Authorized (approved with budget), M - Management Approved (w/o budget), X - Feasibility (limited budget to determine..), C - Completed, T - Terminated (EPN has been cancelled).