Subcontracting procedure material wise

HELLO SAP GURU

Today i have implement SAP on TEXTILE industry.& has M-T-O (20)strategy &has 22 plant.

my problem is abt.subcontracting.

this has 4 production line.1 warping 2.sizing 3.weaving 4.QI

In 3rd prd.line has get subcontracting procedure.

But it has 21 vendor (21plant) has same type of machine only different has very speed(RPM)

For my sales order point of view. I use one day 2 machine, next day 5m/c.on next day 10machine

But every machine has different OWNER.ie.different vendor

so how to calculate efficiency of different machine

main problem is

HOW TO DEFINE SUBCONTRACTING PROCEDURE?

Give me detail abt supplying plant & receiving plant.

yogesh

sap pp