The reference standard does not allow variations in schedules to generate energy savings. All basic simulations used to satisfy Credit 1, Optimize Energy Efficiency, must use the same schedules for the Budget and Proposed cases. This approach simplifies inspection of the basic modeling results by the USGBC. To document savings for this scheme, follow the ECB Exceptional Calculation Method. See Section 11.5 of the ASHRAE 90.1 User\'s Manual. Under the ECM, schedule variations may be used as a basis of engineering calculations for discrete measures that are precluded by the reference standard or the LEEDTM EMP. The savings should be modeled as a discrete measure, and the resulting energy savings deducted from the DEC\'. This handles the "exceptional" savings in the same fashion as renewable energy. An engineering narrative must provide a theoretical basis and describe the expected interactive modes the measure will have with other systems of the basic simulation, and it shall describe all of the assumptions in the analog system model used to predict the savings. Advanced approval (prior to Application) of the proposed analog model and the predicted savings through this Credit Interpretation Request process is suggested. Applicable Internationally.