MRP Planning for two different plants

Dear all,

This is my scenrio.

We have two different plants 1000 and 1100,

Plant 1000 Capsule manufacturing and plant 1100 Formulation plant.

Both plants run MTO scenrio.

For plant 1000 ,capsule is FERT & for plant 1100 same capsule is RM (ROH)l for formulation and using BOM for FG Material.

Plant 1100 got a sale order to run MRP and it creates a PR for capsule and we need to convert into stock transfer PO and doing stock transfer from 1000 (mm route)

What is methodology for plant 1000 to produce the required capsules ( only STO is available and Sales order not available)

What is the reference for creation of planned order?

What is the reference document for plant 1000 for producing the capsules?

Ofcourse transfer of capsuels from 1000 to 1100 could be donethro an allready released stock transport PO ( mm)

I have some cllues

Planned reuirements are created thro a) sale order b) independent requirement.

If I go by independent requirement, how plant 1000 identifies that there is a requirement at plant 1100.

There is no exclusive sale order for 1000 for producing the FERT.

Please enlighten.

thanks

S Sakthivel