The precision engineering workflow problem
Precision engineering shops in Singapore handle complex, customer-specific work. Every job is different. Tolerances are tight. Material selection matters. Subcon operations — heat treatment, surface finishing, plating — add lead time and cost that must be tracked job by job. Customer-supplied material must be allocated without cross-contamination. And delivery is typically promised within days or weeks, not months.
The workflow starts at quoting, where an engineer must estimate material cost, machine time, tooling setup, subcon fees, and a margin — often from memory or a spreadsheet. It ends at invoicing, where the actual job cost should be compared to the quote to identify where margin was lost. Most precision engineering shops have nothing in between that creates this closed loop.
What the ERP must handle
Quote-to-order conversion: the ERP must carry the quote structure — material, routing, subcon, tooling — into the production order without rekeying. Rekeying is where errors enter. A quote that took 30 minutes to build should become a production order in one click, with all cost components pre-populated.
Job routing: each production order needs a routing — a sequence of operations with allocated machine or workcentre, estimated cycle time, and setup time. The routing drives the production schedule and is the basis for actual vs estimated time comparison.
Machine capacity planning: booking jobs to machines must account for existing commitments. A simple Gantt or capacity calendar showing machine load by week is usually sufficient. Complex scheduling optimisation is rarely needed at SMB scale, but visibility of overloaded machines before accepting an order is critical.
Subcon management: parts sent for external operations must be tracked — who has them, when they are due back, and at what cost. Subcon delays are the most common cause of late delivery in precision engineering. The ERP should show open subcon items as a live list, not a spreadsheet the buyer maintains.
Job costing: at job close, the ERP must produce an actual vs estimated cost report covering material, machine time, subcon, and overhead. This is the primary tool for quote improvement over time. Without it, the same quoting mistakes repeat.
Where off-the-shelf ERPs miss
Standard ERPs like Odoo or SAP B1 handle multi-level BOM and purchase orders adequately. They do not handle job routing with machine-level capacity, subcon tracking as a first-class workflow, or job costing at the granularity precision shops need. Workarounds exist — custom modules, third-party add-ons — but each adds cost and a maintenance dependency.
The result for most precision engineering shops is a core ERP used for purchasing and invoicing, Excel still running for quoting and job tracking, and a gap in the middle where margin is lost. The ERP investment does not produce the workflow benefit because the system does not cover the actual workflow.
What a custom build delivers
A custom ERP for a precision engineering shop covers the quote-to-delivery loop as a single integrated workflow. Quoting, job creation, routing, machine scheduling, subcon tracking, goods receipt, inspection, invoicing, and job cost report — all in one system with no rekeying between steps.
For a 20–60 person precision engineering shop, this scope typically costs S$35,000–S$90,000 with 12–20 weeks build time. EDG grants commonly cover 50–70% of qualifying costs, reducing net spend to S$10,000–S$45,000.
Starting the scoping process
Document your current quoting process in detail: what inputs does the estimator use, what does the output look like, and where does information get rekeyed into the next step? This workflow map becomes the functional requirement for the ERP scope. A paid discovery engagement will produce this map, a gap analysis against your current tools, and an EDG-ready project scope document.