Estimate unit cost without hiding waste and unfinished work
Bring materials, labour and overhead together using quantities you can reconcile.
Define what one finished unit means
Agree on the product, batch size and acceptable output before calculating cost. Keep the bill of materials and its units consistent. A recipe for one batch and a production order expressed in pieces need an explicit conversion.
Separate expected and actual material use
The bill of materials gives a planned quantity. Record the material actually consumed, returns and scrap against the order. A difference may come from waste, a substitution, a measurement error or an outdated recipe. Investigate the reason before changing the standard.
Allocate labour and overhead consistently
Record direct labour for the production order where possible. Use a reasonable, stated basis for shared costs, such as labour hours or machine hours. Apply it consistently across comparable batches. Explain whether the figure includes packaging, freight and tax instead of silently changing the definition.
Count good output and work in progress
Dividing all costs by the planned output understates cost when fewer saleable units are produced. For a completed batch, divide attributable total cost by good units completed. For unfinished batches, identify work in progress rather than charging every cost to the first finished items.
Compare batches, then act
Review material variance, rework, rejected output and time spent. Dastyar’s production area keeps products, bills of materials, orders and progress reports together. Confirm your costing assumptions with your accountant: an operational estimate is not automatically a statutory inventory valuation.
Further reading: IFRS Foundation: IAS 2 Inventories.