Manufacturing ERP Guide: BOMs, MRP, Shop Floor and Costing
A practical guide to manufacturing ERP: modelling BOMs and routings, making MRP trustworthy, shop-floor data capture, costing, quality and traceability.
Industry · Manufacturing
Context
A fabrication ERP connects the estimate to the job that follows: the same material, the same operations and the same rates, so after the job ships you can see exactly where the estimate was right and where it was not.
01Operational challenges
Quotes are built in spreadsheets and never compared with real material usage and labour hours.
Sheet, plate and bar stock bought in bulk without visibility of which jobs will consume it or what remnants are already on the rack.
Customers ask for mill certificates and heat numbers for a part shipped months ago, and finding them means searching paper files.
Laser, press brake and welding bays are overloaded some weeks and idle others, with no forward view of load.
02Core flows
03Industry workflows
The estimate's material and routing become the job's planned material and operations, giving a direct comparison after completion.
Mill certificates attached at receipt, heat numbers carried through cutting to finished parts, and certificates included in shipping documents.
Off-cuts above a minimum size recorded as stock with dimensions and offered first when nesting new jobs.
Parts shipped to a coater or plater on a subcontract order and received back into the job with cost and lead time tracked.
04 — Reporting
05 — Compliance
Structural and pressure work may require welder qualifications, welding procedure specifications and material traceability. Customers in construction, energy or defence often demand mill certificates and inspection records with every shipment. Storing certificates against heat numbers and linking them to shipped parts makes these requests routine.
Regulatory requirements vary by jurisdiction. We configure the system to support your obligations; confirm specific rules with your auditor or compliance advisor.
06 — Integrations
Nesting software for laser and plasma cutting is the key integration: exporting job parts and importing nest results with actual material consumption. CAD data for part geometry, carrier platforms for shipping and accounting for progress billing are common additions.
07AI opportunities
Practical uses that sit on top of clean ERP data. None of them replace getting the core transactions right first.
Extract dimensions, material callouts and finishes from customer drawings to pre-fill estimate lines for review.
Read mill certificates on receipt and record heat numbers and chemistry against the material lot.
Find previous jobs with comparable parts and show their actual costs to inform new quotes.
08ERP modules
09Roadmap
Agree labour and machine rates, material pricing rules and a standard estimate structure.
Go live with estimates, jobs, material purchasing and inventory by grade and heat.
Operators record time by operation on tablets at each work centre.
Monthly estimate-versus-actual review feeding back into rates and estimating rules.
10Common mistakes
Without operation-level time, job costing reverts to estimates and the system cannot improve quoting.
Recording sheet stock without grade, thickness and heat makes traceability impossible later.
Manually re-entering parts into nesting software reintroduces errors the ERP was meant to remove.
One operation per machine is usually enough. Splitting steps finer adds data entry without better decisions.
Explore further
Insights
A practical guide to manufacturing ERP: modelling BOMs and routings, making MRP trustworthy, shop-floor data capture, costing, quality and traceability.
Odoo 20 manufacturing changes for production teams: continuous production, MO Kanban, split orders, the single Produce button, shop floor and PLM updates.
Setting up Odoo Manufacturing properly: bills of materials, work centres, operations, kits and phantom BOMs, subcontracting, MRP planning and costing, plus common traps.
FAQ
Yes. Each job can have its own BOM and routing derived from the estimate, without creating permanent product records for one-off parts.
Integration depends on the nesting system's export and import capabilities. Most support file-based exchange of parts and nest results, which we automate.
Yes. Certificates stored at receipt can be printed or emailed with the shipping documents for the parts made from that heat.
Milestone or percentage-of-completion invoicing can be configured against the sales order, with costs tracked on the job.
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Next step
We will show you how estimate-to-job costing would work in your shop.