Process Scrap:
The scrap expected or anticipated prior to production is a normal process scrap. It is thus called a standard scrap. A provision for such a scarp is made before starting production example: Aluminum chips in fin press machine.
Abnormal Scarp
The scrap realized over the process scrap is called an abnormal scrap. Abnormal scrap arises because of abnormal working conditions, bad working condition, carelessness, rough handling, lack of proper knowledge, low quality raw material, machine breakdown, accident etc. Therefore an abnormal scrap is an unanticipated loss. Example: Damage Heat exchanger due improper bending process etc .