Track Raw Material Consumption in Fabrication

Track fabrication material consumption by reconciling gross material issued, usable returns, finished-part material and recorded losses using consistent units. Material sent to a job is not automatically all consumed, and an offcut is not automatically waste.

Assign each issue and return to a job, material grade, stock unit and relevant lot or heat identity. Define whether the record uses length, area, weight or pieces, and approve any conversion method before comparing quantities.

Reconcile a bar-stock example

This illustrative calculation starts with a 6,000 mm bar. The job produces five 1,000 mm lengths, with five cuts at an assumed 3 mm kerf per cut and no end trimming. It is a quantity-accounting example, not a recommended cutting process or a customer result.

The balance is 5,000 + 15 + 985 = 6,000 mm. If the 985 mm remnant meets the factory's reuse criteria and is returned to stores, it remains stock. If it is unsuitable, record its approved disposition; do not leave it as usable stock merely to make the job cost look lower.

Give reusable remnants an identity

Record the remaining dimensions, grade, source lot/heat where needed, location and inspection status. A bin labelled “offcuts” without dimensions or identity makes later planning unreliable. Determine who checks whether a remnant can satisfy another approved job.

For sheet material, retain the dimensions or usable shape information needed for planning. Area alone may not establish that a required part fits. Any nesting or cutting decision needs the actual geometry, allowance and process constraints.

Distinguish expected allowance from observed loss

A planned kerf or yield allowance is an assumption used before work. Actual scrap, rejection and rework are observations recorded afterward. Keep both so the team can investigate whether the standard, the process or the movement record needs correction.

If a weighed return differs from an estimated length-to-weight conversion, check the dimensions, grade, measurement and approved conversion basis. Do not combine kilograms and millimetres in the same arithmetic. Record the measurement method so another person can repeat the check.

Connect the physical handoff to stock and job records

ERPNext's stock-entry documentation illustrates material-movement records. In your process, link the return to its original issue and job, and check how the software values or re-identifies a remnant before assuming that behavior.

Use the stock-ledger example for a simple movement register and the quotation-to-job-card guide to keep the approved material specification attached to work. In an Optiwise production demo, ask to reconcile one issue, partial consumption and usable return with your actual units.

Questions from manufacturing teams

Is material issued the same as material consumed?

Not when some material returns to stores unused. Reconcile gross issue, usable returns, material in output and recorded losses within a defined unit and job scope.

Should every offcut be recorded as scrap?

No. Check whether it meets approved reuse requirements and retains enough identity and dimension information for another job. Record usable returns and approved waste separately.

Can weight alone show whether a sheet remnant is usable?

Weight may support quantity accounting, but it does not establish the geometry available for another part. Keep the dimensions or usable-shape information needed by planning.