Sales order assignment in process order where MRP is based on MTO

Dear Sap User,

FERT Material used planning strategy 40 (MTO) . MRP RUN has been performed based on sales order. My requirement is;

1. 1. Generally planned order is converted to process order. Under the process order of assignment tab, there is a sales order number field. I want sales order number will be populated at the time of creation of process order.

1. 2. This production qty with reference of process order can be dispatched with that sales order.

1. 3.  Reversal option to be mentioned, if not required.

1. 4. Also want to know, if there are several planned order, unless and until the 1st planned order is not being fully converted to process order, 2nd planned order cannot be converted to process order. 

1. 5. Reversal option to mentioned, if not required.

Please help me.

Regards,

Amit Biswas