In Injection moulding process pls.raw material is used. During this process raw material is injected in the die through the runner.Semi Finished components called as moulded components are produced in each cycle.Some components get rejected during the process& runners are also generated.Some of these rejected componenets as well as runners are going to use again by grinding in a cutter & making a new regrinded material & later on it will be injected to manufacture moulded components again.But sometime the scrap components & runners are sold as scrap. How to map this scenario in system? I know I can use runner as by product & define in BOM as -ve qty.And how to maintain the cost related issue.
Example
Raw material---pc clear100g
Moulded component------Lens1 Nos
Runner----
20g
Pc clear 100g is inclusive of runner 20g for making of 1Nos of Lens.
Now on production entry of 10 nos of Lens raw material pc clear consumed will be 1Kg.Say OK components are 5 & scrap punched as 5.And runner is 200G.Also what will be my material type & cost for runner.
Regards
r sehgal