You can execute custom calculations using the MaxL execute calculation statement (aggregate storage version).
You can execute custom calculation scripts using the Essbase API. Use EssPerformCustomCalcASO to perform or verify a custom calculation on an aggregate storage database. Provide the information for the custom calculation in the ESS_PERF_CUSTCALC_T structure.
You can also use Oracle Hyperion Calculation Manager to design a custom calculation and deploy it for execution to Enterprise Scheduling Services.