How to Validate the deferred balance in the Waterfall Report?

[Vishva]

Version: 2.3, 2.4

For arriving the deferred balance, all the future revenue of the Waterfall report run period(For ex Apr-19) excluding the current report run period(For ex Apr-19) Plus 'F-Alloc. Unscheduled Revenue'  Plus ' F-Unscheduled Revenue' should be taken into consideration.

The Manual deferred balance can be compared to the system deferred balance and the same can be compared to the 'F-Total DREV Ending Balance'. Deferred Balance should be matching with each other.