The verdict in three sentences
A custom MES costs between 80,000 and 250,000 EUR in 2026 depending on the number of lines and IoT integration depth. It delivers real-time shop-floor supervision, OEE and traceability that spreadsheets and an ERP alone cannot. ROI shows as an OEE gain of 8 to 15 % and scrap cut by 20 %.
Custom MES vs off-the-shelf: the 2026 numbers
Off-the-shelf MES platforms exist (Aveva, Siemens Opcenter), powerful but heavy and license-costly. Custom targets SMEs and mid-caps that want to fit their processes without paying for an oversized platform.
| Criterion | Off-the-shelf MES | Custom-built |
|---|---|---|
| Upfront cost | 100,000 - 400,000 EUR | 80,000 - 250,000 EUR |
| Annual licenses | 20,000 - 80,000 EUR | 0 (owned code) |
| Deployment time | 6 - 12 months | 5 - 9 months |
| Process fit | Constrained config | Total |
| IoT/machine integration | Standard | Custom (OPC-UA, MQTT) |
| ERP integration | Connectors | Fully tailored |
| Code ownership | No | Yes |
Modules of a custom MES
MES is modular: teams often start with work-order tracking and OEE, then add quality and traceability.
| Module | Complexity | Range (EUR) |
|---|---|---|
| Work-order tracking | High | 18,000 - 40,000 |
| Real-time shop-floor supervision | High | 20,000 - 50,000 |
| OEE calculation | Medium | 12,000 - 28,000 |
| Quality management + checks | High | 15,000 - 35,000 |
| Batch/component traceability | High | 15,000 - 40,000 |
| Machine IoT integration | High | 15,000 - 45,000 |
| ERP integration | Medium | 10,000 - 25,000 |
Traceability is often the project trigger: in food, pharma or automotive, tracing a batch in minutes is both a regulatory requirement and a sales argument.
Mini case study
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Thomas, industrial director of a 120-person plant near Amsterdam, runs 8 lines with an average OEE of 68 %. Untracked stoppages and scrap cost roughly 320,000 EUR/year. He invests 165,000 EUR in a custom MES (work orders + OEE + quality + traceability + IoT integration).
Over 18 months: OEE rises from 68 % to 78 % (+10 points), added production capacity equivalent to about 480,000 EUR/year in extra revenue. Scrap falls 20 %, saving about 64,000 EUR/year. Payback in under 8 months, on top of reduced regulatory risk.
FAQ
What exactly is OEE? OEE (Overall Equipment Effectiveness) combines availability, performance and quality. An 8 to 15 point gain is common after deploying an MES on poorly instrumented lines.
Does MES replace the ERP? No, they are complementary: the ERP plans and handles commercial/financial, the MES drives real-time shop-floor execution. Integration between the two is key.
How do we connect old machines? Via IoT gateways (OPC-UA, MQTT, added sensors). Even machines without a digital interface can be instrumented, budget included in the IoT module.
What's the annual maintenance budget? Budget 15 to 20 % of development, i.e. roughly 25,000 to 45,000 EUR per year for a 165,000 EUR project.
Can we deploy line by line? Yes, it's recommended: start on a pilot line (2-3 months), validate ROI, then roll out progressively to other lines.
Let's scope your project. Tell us your number of lines, current OEE and ERP, and we'll define a scope with an indicative budget. Detailed quote within 48 h. WhatsApp +221 77 596 93 33.
Mohamed Bah
Fondateur, Kolonell
Passionate about digital and entrepreneurship in Africa, Mohamed has been helping Sénégalese businesses with their digital transformation since 2020. Founder of Kolonell, he believes every SME deserves a professional and accessible online présence.
