Hi lucky,
To add Jogeswara, I would recommend you to set influence as order type, otherwise it will be input entry to all other order type. It will may affect other business process.
to set influence as suggest by Jogeswara go to OIAN T-CODE
double click on equipment
you will see below screen, then do single click on order type, click on new value
my refurbishment order type is PM04 which excluded from required entry.
Now equipment entry is mandatory to all other order type except refurbishment (PM04)
Regards,
sitanshu