Nesting and offcuts, material certificates, welding qualifications: the ERP that holds the margin of a workshop where material accounts for half the cost price.
In a sheet metal or plate fabrication shop, material often accounts for half the cost price. A quotation costed on the finished weight rather than on the weight committed is systematically wrong, and always in the same direction.
The gap comes from nesting. What you are invoiced for is the sheet format purchased; what you deliver is the cut part. Between the two sits an offcut rate that depends on the cutting plan, the format chosen and the way jobs are grouped.
Added to this is the volatility of metal prices. A quotation valid for three months on a fixed price basis transfers the whole risk to you.
On regulated structures, conformity is proven by documents produced during manufacture, not afterwards. The EN 10204 3.1 material certificate must be attached to the part, not filed away in a supplier folder.
For welded assemblies, EN ISO 3834 sets out the quality requirements, with qualified welding procedures (WPS and WPQR) and welders whose qualifications carry an expiry date. A welder whose qualification has lapsed invalidates the structure.
AVIA ERP calculates the committed weight from the nesting plan, values reusable offcuts, attaches material certificates to the batch and blocks a welding operation assigned to an operator not qualified as at today's date.
The offcut rate enters the costing. The systematic gap between forecast margin and margin achieved disappears.
Once identified and valued, they are reused instead of being scrapped for want of knowing they exist.
The check happens at clocking, before the structure is built, and not during the customer audit.
Material certificates and inspection reports are attached in production, not gathered together at delivery.
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