The verdict in three sentences
An MES (Manufacturing Execution System) makes the shop floor visible in real time: work orders, OEE, traceability and machine downtime. In 2026, a custom build costs 70,000 to 200,000 EUR over 24-36 weeks, ERP connector included. Typical gains: +8 to +15 OEE points and -20 % scrap, which quickly pays back the investment on a high-throughput line.
What an MES covers and its 2026 cost
An MES is not an ERP: it pilots shop-floor execution where the ERP handles planning. Here are the building blocks and their budget weight.
| Functional block | Role | Indicative budget weight |
|---|---|---|
| OEE tracking | Measure availability, performance, quality | 15 - 20 % |
| Work orders | Launch and track work orders live | 20 - 25 % |
| Traceability | Batch/product genealogy, recalls | 15 - 20 % |
| Machine data (IoT) | Automatic downtime capture | 15 - 25 % |
| ERP connector | Sync work orders, stock, BOMs | 10 - 15 % |
| Shop-floor dashboards | Andon, real-time screens | 10 - 15 % |
The quantified gains of an MES
OEE is the crux. Here are the 2026 orders of magnitude on a typical industrial line.
| Metric | Before MES | After MES |
|---|---|---|
| OEE | 55 - 65 % | +8 to +15 points |
| Scrap rate | Baseline | -20 % |
| Production data entry | Manual, delayed | Real time |
| Batch traceability | Hours of search | Minutes |
| Reaction to machine stop | Delayed | Immediate (andon) |
Mini case study
Claire runs a food-processing plant in Rennes: a line producing 4.2M EUR/year of value, current OEE of 60 %. A custom MES at 150,000 EUR (maintenance 22,500 EUR/yr) raises OEE from 60 % to 70 % (+10 points), i.e. additional capacity valued at ~700,000 EUR/year (with a realistic contribution margin of ~140,000 EUR). Adding -20 % scrap (estimated at 45,000 EUR/yr), the margin gain exceeds 180,000 EUR/year. Net of maintenance, ROI is reached in about 12 months.
FAQ
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What is the difference between an MES and an ERP?
The ERP plans (orders, stock, purchasing); the MES executes and measures on the floor (work orders, OEE, stops). The two complement each other via a two-way connector.
How many OEE points can we realistically gain?
A 2026 order of magnitude of +8 to +15 points depending on the starting point. The lower the initial OEE (55-60 %), the higher the fast-gain potential.
Do we need to connect machines from day one?
Automatic capture (IoT) maximises data reliability. You can start with semi-manual entry then automate priority lines in phase 2.
Is custom mandatory for an MES?
For specific processes (food, pharma, bespoke industry), yes. Custom ensures traceability and work orders match your routings exactly.
What maintenance budget should we plan?
Expect around 15 %/year of the build: new lines, routing changes, regulatory traceability requirements.
Let's scope your project. Describe your lines, current OEE and traceability needs — we price build, ERP connector, maintenance and ROI. 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.
