Change No in MM01

Dear All,
In  MM01 transaction, change no field what is significance & use of this.
is any config of this please guide.
Thanks
Shital

Dear,
In material master you can make your changes with reference to a change number. This identifies a change master record in engineering change management and has the advantage that changes to different objects (such as the material, bill of material, or routing) can be grouped together under this number. If, for example, a particular product gives rise to a complaint, you can record any resulting changes to the relevant objects under this number.
If you process a material with the function Change ---Schedule, then you can change the material with reference to a change number if the valid-from date is in the future.
Configuration link has already given you by Mr. Vikas refer it.
Also refer this link,
http://help.sap.com/saphelp_erp2005/helpdata/en/d8/7329d14b7511d1894b0000e8323c4f/frameset.htm
Hope it will clear you doubts.
Regards,
R.Brahmankar

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