IECM 13.0 User Manual > Using the IECM > Setting Parameters > Parameter Screens > Standard Parameters >

Calc

Some parameters may be calculated by the model. Parameters which have this option will have a checkbox in the Calc column:

Some Calculated Values on the SET PARAMETERS: Overall Plant: O&M Cost screen for PC Plants

If the box is checked, the parameter is currently being calculated by the model and the value cannot be edited. If you want to override a calculated parameter, click the checkbox to remove the check and allow the value to be edited.