Dear Raj
Please refer to the link
http://help.sap.com/saphelp_46c/helpdata/en/cb/7f941a43b711d189410000e829fbbd/content.htm
You have to use strategy group 20 as shown in attachment for material master
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Once marketing/sales creates Sales Orders in the system, you can run Make to Order planning (Transaction MD50)
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Regards
Vivek Tembe
