Schedule Lines as Forecast demand

Hi

We have a specific requirements for Demand Planning against the customer schedule lines. If the customer schedule lines are received as Forecast we don't want to produce products but at the same time want the demand to be propagated down the BOM level for sharing the demand of Raw Materials with Vendors. We want the production to initiate only when the customer sends a JIT release against this forecast. Has anyone worked on this or any ideas on ho this can be achieved in the system.

Thanks