Editing of scheduled dates in Process Order Operations

Hello,

I have a requirement, in which the client would like to change the Scheduled dates in the operation details of a process order.

In the header screen of a process order, if we change the basic start / finish dates (depending on forward or backward scheduling), and reschedule the process order, the process order is rescheduled, with the new dates.

The client's requirement is, they should be able to change the Scheduled dates in the tab "Operation - Dates", of the "Operation overview" screen, in a process order. Normally the field is not editable, and the system calculates the dates, based on the start / finish dates, entered in the process order header.

I would like to know, what is the way out, to meet this requirement.

Thanks.