check the below enhancements in transaction SMOD.

CCOWB001 Customer exit for modifying menu entries

COIB0001 Customer Exit for As-Built Assignment Tool

COZF0001 Change purchase req. for externally processed operation

COZF0002 Change purchase req. for externally procured component

PPCO0001 Application development: PP orders

PPCO0002 Check exit for setting delete mark / deletion indicator

PPCO0003 Check exit for order changes from sales order

PPCO0004 Sort and processing exit: Mass processing orders

PPCO0005 Storage location/backflushing when order is created

PPCO0006 Enhancement to specify defaults for fields in order header

PPCO0007 Exit when saving production order

PPCO0008 Enhancement in the adding and changing of components

PPCO0009 Enhancement in goods movements for prod. process order

PPCO0010 Enhancement in make-to-order production - Unit of measure

PPCO0012 Production Order: Display/Change Order Header Data

PPCO0013 Change priorities of selection crit. for batch determination

PPCO0015 Additional check for document links from BOMs

PPCO0016 Additional check for document links from master data

PPCO0017 Additional check for online processing of document links

PPCO0018 Check for changes to production order header

PPCO0019 Checks for changes to order operations