1)Operator was running all programs by editing the CYCLE 800 PROGRAM. 
2)CYCLE 800 PROGRAMS are used due to insufficient stroke in the machine.
2)This insufficient stroke resulted due to "CYCLE 800 PROGRAM INTRODUCTION".
3)CYCLE 800 PROGRAMS are used by the operators of rotation of the table.
4)Due to this unproper editing the part got rubbed to the tool while machining which resulted in Large dig at the rib top.