Manufacturing & Industry 4.0 Testing Services
Independent QA for MES, SCADA, industrial IoT, and digital-twin systems — IEC 61508 functional-safety, IEC 62443 OT cyber-security, OPC UA / MQTT protocol conformance, and ERP↔shopfloor integration. Auditor-ready evidence, zero production disruption.
What we cover
- MES + SCADA functional + failover testing
- IEC 62443 OT cyber-security assessments
- IEC 61508 / ISO 26262 functional safety
- OPC UA / MQTT / Modbus / PROFINET conformance
- Digital-twin parity + drift detection
- ERP↔shopfloor integration QA
The six manufacturing-specific failure modes we test for
Plant-floor and Industry 4.0 systems fail differently from generic web apps. These are the ones that translate into line stops, audit findings, or safety incidents.
OT Cyber-security Under IEC 62443
Operational-technology networks are flat, legacy, and often invisible to IT. A single weaponised USB or compromised vendor laptop can pivot from a HMI all the way to the PLC layer.
Testriq approach: Segmentation audits, DMZ + jump-host validation, and OT-aware penetration testing across IEC 62443 security levels SL1–SL4 — without disrupting production windows.
Functional-Safety Validation (IEC 61508 / ISO 26262)
Safety-critical control software needs SIL-rated validation, fault-injection coverage, and HAZOP-driven test design — a generic test suite will not survive a notified-body audit.
Testriq approach: SIL-rated test plans aligned to IEC 61508 / ISO 26262, with fault-injection coverage, traceability matrices, and audit-ready evidence packs.
Protocol Interoperability — OPC UA, MQTT, Modbus, PROFINET
Industrial IoT stacks are heterogeneous by design. Vendor implementations of the "same" OPC UA or Modbus profile diverge in subtle ways that only surface under real device matrices.
Testriq approach: Conformance + interoperability testing on real shop-floor and lab-bench device matrices — catching profile drift, byte-order issues, and timing edge cases before they cause line stops.
MES / SCADA Failover & Data-Path Reliability
PLC → HMI → historian data paths are the eyes of the plant. Silent failures — clock drift, dropped tags, historian gaps — corrode OEE without an obvious alarm.
Testriq approach: End-to-end MES + SCADA testing covering failover, tag-rate sustained load, historian gap detection, and recipe-management edge cases.
ERP ↔ Shopfloor Integration Drift
SAP / Oracle / Dynamics ERPs hold the BOM, work orders, and inventory state — but the shopfloor lives in MES + historian + SCADA. Sync drift causes phantom inventory, missed work orders, and reconciliation nightmares.
Testriq approach: End-to-end ERP ↔ MES integration QA covering BOM propagation, work-order lifecycle, inventory movements, and exception-flow reconciliation.
Digital-Twin & Predictive-Maintenance Drift
Digital twins are only as good as their parity with the physical asset — and ML-based predictive-maintenance models silently degrade as machine wear-patterns evolve.
Testriq approach: Parity testing of digital-twin models against physical telemetry, drift-detection harnesses, and ML-model accuracy regression suites for predictive-maintenance pipelines.
Manufacturing & Industry 4.0 testing services we offer
Each service is sequenced around your maintenance windows and integrates with existing system-integrator workflows.
MES / SCADA System Testing
Functional, integration, and failover testing of Manufacturing Execution Systems and SCADA stacks, including PLC ↔ HMI ↔ historian data-path validation.
IEC 62443 OT Cyber-security Testing
Penetration testing + segmentation audits for OT networks per security levels SL1–SL4, with DMZ + jump-host validation.
IEC 61508 / ISO 26262 Functional-Safety Validation
SIL-rated test plans, fault-injection coverage, HAZOP-driven test design, traceability matrices for safety-critical industrial control software.
Industrial IoT Protocol Testing
Interoperability + conformance testing for OPC UA, MQTT, Modbus, PROFINET on real shop-floor + lab-bench device matrices.
Digital-Twin & Simulation QA
Parity testing of twin vs physical asset telemetry, drift-detection harnesses, predictive-maintenance ML model accuracy regression.
ERP ↔ Shopfloor Integration Testing
End-to-end QA of SAP / Oracle / Dynamics ERP integration with MES — BOM sync, work-order propagation, inventory-movement reconciliation.
Predictive-Maintenance Analytics Validation
Validation of feature pipelines, model drift detection, alert-suppression logic, and feedback-loop integrity for predictive maintenance.
Plant-Floor Application UX & Accessibility
Glove-friendly UI testing, gloved-touch tap targets, high-contrast HMI validation for shopfloor tablets and panel-mount displays.
How we engage
Five steps from plant-floor discovery to ongoing OT monitoring — typically 8–15 weeks for a first-pass IEC 62443 / IEC 61508 evidence cycle.
Plant-Floor Architecture Discovery
Map your OT topology, control-system layers (Purdue Reference Model), MES + SCADA + historian + ERP integration paths, and the safety + cyber-security regulatory perimeter.
Risk + Safety-Case Test Strategy
Prioritise failure modes that affect safety, uptime, quality, and audit posture. Map every test to IEC 61508 / IEC 62443 / ISO 27001 control where applicable.
Lab + Shop-Floor Test Execution
Bench-test against real device matrices for protocol conformance; shop-floor smoke tests during planned maintenance windows to avoid production disruption.
Continuous OT Monitoring
Synthetic transactions and historian-gap detectors continuously validate the PLC → HMI → historian data path so silent failures surface before OEE degrades.
Compliance + Audit Evidence Packs
Auditor-ready evidence for IEC 61508 SIL claims, IEC 62443 security-level certification, and ISO 27001 ISMS controls — versioned + traceable to specific test runs.
Standards we validate against
Each standard mapped, each test traceable, each run packaged as auditor-ready evidence.
Frequently Asked Questions
Can you test OT systems without disrupting our production line?
Yes — and that is the operating assumption from day one. Penetration testing and high-impact validation happen against lab-bench replicas of your PLC + HMI + historian stack, with read-only passive monitoring on the live network during planned maintenance windows. Live-line tests run only with site engineering sign-off and a rollback plan attested in writing.
Do you work alongside our existing system integrator or replace them?
Alongside. System integrators (Rockwell / Siemens / Honeywell / Emerson partners, etc.) own the platform engineering; Testriq owns independent test execution + audit evidence. The two are complementary — auditors actually prefer the segregation of duties.
What's a realistic engagement timeline for an IEC 62443 cyber-security assessment?
Scoping + asset inventory: 2–3 weeks. Lab-replica build + threat modeling: 2–4 weeks. Active testing (segmentation, jump-host, vendor pathway): 3–6 weeks depending on scope. Evidence-pack delivery: 1–2 weeks. So 8–15 weeks for a complete first-pass per security level claim.
Do you handle FDA 21 CFR Part 11 validation for regulated manufacturing?
Yes — for life-sciences / pharma manufacturing systems where electronic records + e-signatures fall under 21 CFR Part 11. We extend the same evidence-pack discipline used for IEC 61508 traceability to cover Part 11 controls (audit trails, signature manifestation, access controls).
How do you test digital-twin model parity against a physical asset?
We build a parity harness that ingests live telemetry from the physical asset and the corresponding twin output, computes drift metrics on a defined cadence, and alarms on threshold breaches. For ML-based predictive-maintenance, the harness also tracks model-accuracy regression against a held-out evaluation set.
Are your testers ISTQB-certified and operating under documented controls?
Yes — Testriq is ISTQB-certified across the lab and operates under ISO 9001 + ISO/IEC 27001 information-security controls. Customer data, design documents, and test artifacts are handled accordingly under NDAs + retention policies sized to engagement type.
Independent QA for safety-critical manufacturing systems
Talk to a manufacturing QA lead about a tailored IEC 62443 / IEC 61508 / Industry 4.0 test plan that respects your maintenance windows and audit timeline.
Get a manufacturing QA proposal