Spreadsheets that no longer keep up. A quality audit that exposed gaps in your traceability. An automotive OEM asking for production data you can’t easily produce. Downtime you can see is costing money but can’t quantify. These are the moments UK manufacturers start looking at a Manufacturing Execution System, and they’re usually right to.
The trouble is that off-the-shelf MES products tend to push your plant into the software’s idea of how manufacturing should work. At ByteGears we build custom MES software around how your factory actually runs: your routings, your quality checks, your mix of products and customers. The result is a system your operators will use instead of working around.
Why off-the-shelf manufacturing execution systems fall short
A generic MES can work well for standard, single-site manufacturing. But once your processes are even slightly unusual, the gaps show up fast. Here’s what we hear most from manufacturers who’ve been through it:
- Pricing that scales the wrong way. Cloud MES is typically charged per user or per machine, often with a minimum user commitment. The bill climbs every time you add a line, a shift, or a site, regardless of whether you’re getting more value.
- Rigid workflow enforcement. Many platforms enforce fixed approval chains and can halt a job if a single step is skipped, with no sensible override. Operators respond by circumventing the system, and you end up with a shadow process running on paper.
- Long, expensive implementations. Enterprise MES rollouts commonly run 12–24 months, with implementation costs that can equal or exceed the licence. By the time it’s live, your requirements have moved on.
- Integration that needs middleware to survive. Connecting legacy SCADA, older PLCs, or a non-standard ERP often means iPaaS subscriptions and brittle connectors that need constant maintenance.
- Reporting that doesn’t match your KPIs. Out-of-the-box dashboards rarely show what your plant manager actually needs, so teams end up exporting to a separate BI tool anyway.
- Vendor lock-in. Proprietary data formats make leaving expensive. If the vendor raises prices or drops a feature, your options are limited.
When the software doesn’t fit, the symptoms are familiar: duplicate data entry, manual spreadsheets, slow approvals, and management working from numbers it doesn’t fully trust. That’s the opposite of what an MES is meant to deliver.
What you get with a custom MES from ByteGears
We build a Manufacturing Execution System around your operations, then deliver it in phases so you see value early rather than waiting for a single distant go-live.
Workflow design that fits your shop floor
We map your real production process first, from order release through routing steps, quality holds, rework loops and changeovers. The software follows that flow, including the overrides and escalations your supervisors actually need. No forced process change to suit a template.
A staged delivery, not a 24-month project
Phase 1 covers the core: work order management, real-time WIP tracking, operator data capture, a live production dashboard, and your essential ERP and equipment connections. That’s where most of the day-one value sits. OEE analytics, deeper quality workflows, traceability and predictive maintenance follow in a planned Phase 2.
Direct integration, without middleware sprawl
We connect to your ERP for order and BOM data, and to the shop floor over standard protocols. No third-party integration platform sitting in the middle taking a cut and adding a failure point.
Compliance designed in, not bolted on
Whether you need a clear audit trail and ISO 9001 support, or full electronic batch records for a regulated process, we build the compliance framework you actually require rather than paying for an enterprise platform’s bloat.
A system you own
You get the source code and the database. No per-user licensing, no annual licence renewal, and no migration tax if you ever want to move on. Support is a contract, not a condition of using your own system.
UK-based delivery
Our team handles discovery, build, and support directly. Where data residency matters, including for some NHS-supply work, we can host in UK data centres.
Core MES capabilities we build
Every ByteGears MES is shaped to your requirements, but most builds draw from the following:
- Work order and production execution — create, sequence, track and close orders; operator task lists with the right work instructions and specs at each step
- Real-time WIP tracking — live order status, material movement and machine state on dashboards built around your KPIs, not a vendor’s defaults
- OEE analytics — automatic availability, performance and quality metrics by line, shift or machine, with downtime categorised by root cause
- Quality data capture — point-of-production defect logging, pass/fail inspection results, SPC charts, non-conformance and corrective action workflows
- Material traceability and batch genealogy — parent-child lot tracking from raw material to finished goods, supporting fast, defensible recalls
- Equipment monitoring — machine status, utilisation and maintenance scheduling, with alerts based on runtime or cycle counts
- Mobile and offline operator interface — tablet-first screens that keep working through a network drop and sync when reconnected
- Electronic work instructions — dynamic guides with images and video for complex assemblies
- Configurable reporting — role-based dashboards for operators, supervisors and managers, plus exports into Power BI or your BI tool of choice
- Audit trail and access control — timestamped records of every change and approval, with granular role-based permissions
The system is built around the entities your plant already thinks in: production orders, work orders, BOMs, routings, machines, materials, batches, downtime events and operators, with the relationships between them mapped to how you actually produce.
How we deliver your MES
We work in four phases, with the build itself split so you get a working system early.
1. Discovery and process mapping (2–4 weeks)
Workshops with the people who’ll use the system: operators, supervisors, quality and IT. We document your current process, integration landscape, compliance obligations and the data we’ll need to migrate. Underestimating integration and skimping on process mapping are two of the most common reasons MES projects fail, so we take this stage seriously.
2. Phase 1 build (roughly 8–12 weeks)
Agile development of the core system, with demos every two weeks. Phase 1 typically covers the data model, operator UI, work order and execution modules, basic quality capture, the production dashboard, and the first integrations: ERP order pull and SCADA or PLC equipment status.
3. Pilot and rollout (2–4 weeks)
We pilot on one line or area, validate the data and integrations in parallel with your existing process, then roll out in phases with fallback procedures so production is never exposed.
4. Phase 2 and ongoing support
Once Phase 1 is bedded in, we add OEE reporting, advanced quality workflows, traceability, predictive maintenance and further integrations. Training is delivered in stages around go-live, and we support the system afterwards under a flexible contract.
What the investment looks like
A custom MES is a larger upfront commitment than a SaaS subscription. The case for it is about the total picture over several years, not the first invoice.
- No per-user or per-machine tax. Adding operators, lines or sites doesn’t increase a licence bill.
- No annual licence renewal. Enterprise on-premise MES typically charge 18–22% of licence value every year in maintenance; SaaS keeps charging for as long as you use it.
- It’s an asset, not a rental. You own the code and data and can extend, rehost or migrate on your terms.
- Return shows up in operations — less scrap, faster changeovers, better labour use, and traceability that holds up under audit.
Cost depends on plant size, number of sites, integration complexity and how much regulated-industry compliance you need. We give transparent, requirements-based pricing after discovery rather than a headline figure that won’t survive contact with your shop floor.
We’ll also tell you when custom isn’t the right call. If your process is genuinely standard, your compliance needs go no further than ISO 9001, and you’re happy to adopt a vendor’s workflows, an off-the-shelf platform may serve you well. Custom earns its keep when your workflows are specific, your integration is complex, your compliance is specialised, or you’re planning to grow across sites without re-platforming.
Where custom MES fits across industries
The right MES looks different in every sector. We build for UK manufacturers including:
- Automotive and tier suppliers — control plan enforcement, serialised component tracking through multi-stage assembly, first-article inspection records, and the production data OEM customers increasingly mandate
- Pharmaceutical and biotech — GMP-compliant electronic batch records, 21 CFR Part 11 audit trails, deviation alerts and full genealogy from raw material to finished product
- Medical devices — ISO 13485 quality workflows, device history records, UDI and sterilisation lot tracking
- Food and beverage — recipe and allergen management, environmental monitoring, and lot-level traceability for rapid recall
- Electronics and semiconductor — real-time SPC, yield analysis and component-level genealogy
- Aerospace — AS9100 non-conformance tracking and tight traceability
- Contract manufacturing — customer-specific routings and work instructions, with real-time job costing and margin-per-job that off-the-shelf MES rarely supports
- Metal fabrication — machine utilisation reporting across CNC equipment and changeover tracking
- Chemicals — batch processing with EH&S and SDS integration
- Industrial equipment — work order management, assembly instructions and field service handover records
Common Questions About Custom Manufacturing Execution Systems
How does a custom MES compare on cost to SaaS or enterprise platforms?
A custom build costs more upfront than signing a SaaS contract, but the comparison changes over five years. Cloud MES is usually priced per user or per machine, so the bill grows every time you add headcount, a line, or a site. Enterprise on-premise platforms add annual maintenance of roughly 18–22% of the licence fee, on top of large implementation costs. A custom system has no per-user tax and no licence renewal, so for many mid-sized manufacturers the five-year total cost lands lower. The honest answer depends on your size and integration scope, which we work through with you before quoting.
How long does a custom MES take to build?
We aim to get a usable Phase 1 system on the shop floor in roughly 4–6 months: work order management, production execution, basic quality capture, a live dashboard, and the core ERP and equipment connections. That compares with 12–24 months for a typical enterprise MES rollout. Heavier compliance work, multi-site deployment, or complex legacy integration extends the timeline, and regulated environments add a validation phase. We give a firm estimate after discovery.
Can you integrate with our ERP, PLCs and quality systems?
Yes. On the ERP side we work with SAP, Oracle, Sage, NetSuite and Infor, pulling order and BOM data and pushing completions back. On the shop floor we connect to PLCs and SCADA over OPC-UA, Modbus TCP and MQTT, covering common controllers such as Siemens and Allen-Bradley. We also integrate barcode and label hardware, LIMS, and BI tools like Power BI. Where legacy equipment has no API, we assess what custom drivers are needed during discovery rather than promising it blind.
What happens if the network or the system goes down mid-shift?
Operators should never be stuck waiting for a screen. We build tablet interfaces with offline capability, so data entry continues during a network drop and syncs once the connection returns. For deployment we use phased rollout with fallback procedures and rollback steps, so production keeps running if something needs attention during cutover.
How do you handle compliance and data security?
Every build includes UK GDPR-aligned data handling, encryption in transit and at rest, role-based access, and a complete audit trail of changes and approvals. Where your sector requires more, we design it in from the start rather than bolting it on: electronic batch records and 21 CFR Part 11 controls for pharma, ISO 13485 and device history records for medical devices, lot traceability and allergen controls for food. We can host in UK data centres where data residency matters.
Do you train our team and support the system afterwards?
We train at every level: operators on work order retrieval and data capture, supervisors on scheduling and escalation, quality managers on non-conformance workflows, and your IT staff on administration. Training is phased around go-live rather than a single session, because one-off training is a common reason MES adoption fails. After launch we offer flexible support contracts, and you own the source code and database, so you are never locked to us.