; EUE The term expected unserved energy or EUE means the cumulative amount of energy (in megawatt-hours) per year that is not provided to customers due to outages. (7) Independent System Operator The term Independent System Operator has the meaning given the term in section 3 of the Federal Power Act ( 16 U.S.C. 796 ). (8) Integrated resource planning The term integrated resource planning means modeling and evaluating how projected long-term electricity demands (such as electricity demands over periods of 5, 10, 20, or more years) within a service area can be met with a combination of electric generation resources that best achieve desired metrics, such as metrics relating to reliability, resilience, and cost. (9) Loss of load expectation; LOLE (A) In general The term loss of load expectation or LOLE means the expected number of days per year that the available generation capacity is less than the system load for the applicable power grid region or service area. (B) Clarification As of November 2023, a commonly acceptable value for loss of load expectation is 0.1 days per year, as described in the standard of the North American Electric Reliability Corporation entitled Planning Resource Adequacy Analysis, Assessment and Documentation and numbered BAL–502–RF–03. (10) Planning reserve margin (A) In general The term planning reserve margin means the quotient, expressed as a percentage, obtained by dividing— (i) the difference between— (I) deliverable electric system supply capacity for a power grid region or service area; and (II) net demand in that power grid region or service area