Meaning
A formal financial and material review verifies the volume and cost of waste material generated during a custom moulding production run. Conducting a scrap allocation audit helps a brand owner determine whether the raw resin lost during setup, purging, and part defects aligns with the agreed-upon contract allowances. This review prevents the contract manufacturer from billing the brand owner for excessive resin waste or using their virgin material to run other jobs.
Material Reconciliation
Auditors compare the total weight of virgin resin supplied to the factory against the combined weight of the finished parts shipped and the remaining raw inventory. In custom moulding, a certain amount of scrap is expected from runners, sprues, and startup purging, but this should not exceed a specified percentage, typically three to five percent. If the audit reveals a discrepancy, it indicates that the moulder’s process is inefficient, or that they are incorrectly allocating regrind or virgin resin to other customer runs.
Identifying these discrepancies allows the brand owner to recover the cost of the wasted resin and demand process improvements.
Financial Settlement
When the audit shows that the scrap rate was higher than the contracted allowance, the moulder must reimburse the brand owner for the excess material cost. This financial penalty incentivizes the moulder to maintain stable process conditions and minimize setup waste. It helps align the interests of both parties.
Process Control
This audit also highlights which parts of the production process generate the most waste. This data can guide the engineering team to optimize runner designs or improve startup procedures to reduce future scrap. This leads to long-term material savings.