For a member tagged as Dynamic Calc, Essbase does not calculate its data value during a batch database calculation (for example, during a CALC ALL). Instead, Essbase calculates the data value upon retrieval (for example, when you retrieve the data into Spreadsheet Add-in or Smart View.)
Specifically, Essbase calculates a data value dynamically when you request the data value in either of two ways:
Essbase does not store the calculated value; it recalculates the value for each subsequent retrieval.