ERPNext Manufacturing Consultant, UK

Subcontract manufacturers and free-issue material

Many British firms are subcontractors themselves. An aerospace or rail customer sends bar stock, castings or kits, and you machine, fabricate or assemble them and send them back. That material is not yours, yet it sits on your racks, passes through your works orders and must be accounted for item by item when the customer asks.

ERPNext has a concept of customer-provided items, received at zero valuation into your stock records. How well that fits depends on your version and on how strict your customers are, so I test it rather than assume it. The rules I agree with you are:

• Which warehouse holds each customer's free-issue stock, so it never mixes with your own.
• How the material is received, against what document, and how shortages or damage are reported back.
• How the BOM for a subcontract job consumes free-issue items alongside your own consumables and labor.
• What returns or scrap certificates you send the customer, and from which records.

Your invoice then covers your labor, consumables and margin rather than the material value. Getting this wrong inflates stock on the balance sheet and confuses margins, so it is part of the costing conversation, not a detail for later. The wider sector picture, including EU trade and product marking, is on the UK manufacturing ERP page.

Works orders, job cards and how much to record

British shop floors vary widely in how much data they will accept. A machine shop with setters on day shift and a skeleton crew at night will not tolerate a screen that demands five fields per operation. A food line with a supervisor per shift may happily record batch, weights and checks at each stage.

I usually propose a staged approach:

1. Start with the works order: material issued, finished quantity booked in, scrap recorded. This alone fixes most stock accuracy problems.
2. Add job cards on bottleneck operations: where knowing actual time changes quoting or capacity decisions.
3. Extend to every operation only when the team is consistently recording the first two stages.

Practical setup choices include shared tablets at cells, printed works order packs with barcodes, and whether team leaders or operators enter times. Workstation types can group similar machines so planning works without listing every lathe separately. Hours recorded here feed product cost; payroll itself remains in your payroll software reporting to HMRC. Because job card entries identify individual operators, decide with HR how long that data is kept and who can see it under UK GDPR. More on the module is on the ERPNext Manufacturing page.

Inspection templates that stand up to customer audits

UK customers audit their suppliers. Retailers send food safety auditors, automotive and rail customers check process control, and larger OEMs ask for first article inspection on new parts or new drawing issues. Those visits are far easier when inspection evidence is in the same system as the batch or works order it belongs to.

In ERPNext I typically configure:

• Goods-in inspection on purchase receipts for critical materials, with supplier certificates attached and stock held until accepted.
• First article templates triggered when a part or its drawing issue is new, recording measured characteristics against tolerances.
• In-process checks linked to job cards for operations where a failure is expensive to discover late.
• Final inspection before delivery, with batch or serial numbers printed on dispatch paperwork.

A quarantine warehouse keeps rejected or unreleased stock out of picking, and a trace report shows which batches went to which customers. ERPNext does not replace a full quality management system for corrective actions, document control or calibration records. If your accreditation requires those, I plan how a dedicated tool sits alongside. Capturing these obligations clearly is part of ERP requirements gathering.

Stock valuation and the conversation with your accountants

For UK companies, stock and work in progress feed straight into the statutory accounts, and your external accountants will have a view on how they are valued. ERPNext runs perpetual inventory: every material issue, works order completion and subcontract receipt posts to the ledger. That is useful only if everyone agrees the rules first.

Points I settle with the finance director and accountants:

• Moving average or FIFO valuation, and whether that is consistent with how stock has been valued until now.
• How workstation hour rates absorb labor and overheads, and how often they are reviewed.
• Which warehouses and accounts hold work in progress, and how part-finished works orders are reviewed at month end.
• How scrap, rework and subcontract processing charges reach product cost.
• How the opening stock value at go-live ties back to the last balance sheet from Sage, Xero or your previous system.

Once the first production cycles have run, I reconcile the stock ledger with the general ledger and walk your accountants through any differences. VAT returns, Making Tax Digital and the move off your old accounts package are covered on the ERPNext consultant UK page, so this page stays with production.

Hosting choices and where ERPNext Manufacturing falls short

UK manufacturers usually choose between Frappe Cloud, self-hosting with a UK or EU cloud provider, or a hosted service from a smaller implementer. Check which hosting regions are on offer if customers ask where data sits. Self-hosting gives control but makes you responsible for backups, patches and upgrade testing. Whichever route you pick, write down who fixes what, and how quickly, before go-live.

ERPNext Manufacturing is the wrong tool, or only part of the answer, when:

• Aerospace or defense customers require quality and configuration control that a general-purpose ERP cannot evidence on its own.
• You schedule many machines to the hour and need finite capacity planning with drag-and-drop resequencing.
• Food production depends on recipe management, allergen matrices and nutritional data that would need heavy customization.
• A specialist UK job-shop package already does estimating and scheduling well, and the real problem is elsewhere.

In those cases I compare ERPNext against alternatives during vendor selection, and the ERPNext vs Odoo manufacturing comparison is a useful starting point. You can read how I work with UK businesses on the UK hub and the ERP consultant UK page.