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Engineering services for safety-critical software.

The disciplines we use to build our own flight software, available on your programme: from requirements through models, code and test to certification evidence, in aerospace, defence and automotive.

Systems engineering and requirements

Requirements defects cost far less to fix before design starts than after integration. We work with your architects and product owners to elicit, structure and verify requirements before a model block is drawn, using INCOSE-aligned practice and MBSE tooling that keeps the programme traceable end to end.

Systems architecture and requirements decomposition

What we do

  • Stakeholder needs and system requirements definition
  • Requirements elicitation workshops
  • System architecture: SAD, logical architecture and ICDs
  • Integration and integration verification planning
  • System verification and compliance evidence
MBSE
Enterprise Architect, MATLAB System Composer, SysML
Requirements management
Polarion, IBM DOORS, MATLAB Requirements Toolbox

Control system design

Control algorithms for batteries, high-voltage switching, thermal systems, vehicle motion and now flight, designed so every model element traces to a requirement and every safety boundary is designed in rather than retrofitted.

Control system architecture

What we do

  • Requirements analysis and decomposition into control functions
  • Requirements-based control design in Simulink and Stateflow
  • Conversion of hand-written or UML designs to autocoded models
  • Simulation and verification against requirements
  • Safety partitioning and safe-state logic from the start
Modelling
MATLAB, Simulink, Stateflow, TargetLink, ASCET
Calibration and data
ETAS INCA, Vector CANape, CANoe
Network simulation
CANalyzer, CANoe

Model-based design

Model-based design lets requirements be tested before code exists and architecture be validated before hardware arrives, with production code generated from the verified model. In aerospace we apply it under DO-331, the model-based supplement to DO-178C.

What we do

  • Modelling standards and architecture guidelines
  • Bidirectional traceability between requirements, model and tests
  • Closed-loop plant models for early verification
  • Reusable, versioned Simulink library architecture
Test environments
MiL, SiL, PiL, HiL and vehicle or aircraft testing
Standards
DO-331, ISO 26262, IEC 61508

Embedded software

Whether the path is autocode or hand-written C, every line we deliver is MISRA-compliant, reviewed, statically analysed and traced to its requirement. Our engineers have deployed embedded software to production ECUs from ASIL A to ASIL D.

What we do

  • Production code generation from Simulink and TargetLink
  • Hand-written embedded C to the same standard
  • Static analysis and code review with Polyspace
  • Software integration on target hardware
Code generation
Embedded Coder, TargetLink
Analysis
Polyspace, MISRA C:2012 checking

AUTOSAR Classic

AUTOSAR Classic application software components, from model-based design to compliant C and ARXML, ready to integrate with your basic software stack.

What we do

  • Application software component development
  • ARXML configuration and interface description
  • Embedded Coder AUTOSAR workflow
  • Runnable-to-task mapping and COM signal configuration
  • Integration support for third-party BSW stacks
Tools
Simulink, Embedded Coder
Outputs
AUTOSAR C and ARXML

Verification and validation

Verification is planned before design begins and runs through every stage. Every test case traces to a requirement, and every structural coverage gap is closed or justified, so the evidence holds up under independent assessment.

What we do

  • Software unit verification and structural coverage analysis
  • Component and integration verification
  • Requirements-based testing with full traceability
  • System integration verification
  • Evidence packages for DO-178C, ISO 26262, ASPICE and IEC 61508
Desktop testing
Simulink Test, TPT, Tessy, BTC EmbeddedTester
On-target testing
ETAS INCA, Vector CANape, CANoe, vTESTstudio
Coverage
Statement, decision, condition and MC/DC
Formal methods
Simulink Design Verifier

MiL, SiL and HiL testing

The earlier a defect is found, the cheaper it is to fix. Model-in-the-loop finds algorithm errors before an ECU exists; software-in-the-loop confirms the generated code behaves like the model; hardware-in-the-loop exercises the final software against real I/O and timing. We run all three with the same test cases and one coverage report.

Model-in-the-loop and software-in-the-loop test environment

What we do

  • MiL testing with full requirements coverage
  • SiL testing and code equivalence checks
  • HiL testing on Vector and dSPACE platforms
  • Fault injection and safety mechanism testing
  • Test case development at system, software and structural level
MiL and SiL
Simulink Test, TPT, Tessy, BTC EmbeddedTester
HiL
Vector and dSPACE rigs, CANape, CANalyzer, INCA

Functional safety and certification

Safety is an architecture decision, not a document at the end. We support airborne software to DO-178C and automotive software to ISO 26262 Part 6, with engineers who have produced certification evidence on live programmes.

Airborne software

  • Planning data: PSAC, SDP, SVP, SCMP and SQAP
  • DAL tailoring and independence planning
  • Tool qualification to DO-330 and model-based development to DO-331
  • Structural coverage to MC/DC for higher design assurance levels
  • Stage of involvement audit preparation

Automotive software

  • Software safety planning and safety requirements
  • ASIL decomposition and freedom from interference
  • Fault injection and safety mechanism verification
  • Safety-compliant code generation settings

Read our DO-178C certification lifecycle practitioner guide.

ASPICE process

Automotive OEMs expect suppliers to demonstrate ASPICE capability, with Level 2 as the entry point and Level 3 increasingly required for safety systems. We set up, run and mature compliant processes across the system, software, support and management groups.

ASPICE system and software engineering processes

What we do

  • Software engineering processes SWE.1 to SWE.6
  • System engineering processes SYS.1 to SYS.5
  • Project management (MAN.3)
  • Configuration, problem and change management (SUP.8 to SUP.10)
  • Gap analysis and assessment preparation
Systems
System Composer, Enterprise Architect, Polarion, IBM DOORS
Software
Polarion, Simulink, Requirements Toolbox, Simulink Test
Support
Jira, Azure DevOps, Git

Toolchain and CI

A poorly configured toolchain is a common cause of programme delay and failed assessments. We set up toolchains where every commit runs traceability checks, model build, code generation, static analysis, testing and coverage, with no manual steps between gates.

What we do

  • Requirements, modelling, code, test and release toolchain set-up
  • CI/CD pipeline configuration
  • Tool qualification support for DO-330 and ISO 26262
MATLAB ecosystem
Simulink, Embedded Coder, TargetLink, ASCET
Configuration management
Git, Jenkins, Azure DevOps
Testing
BTC EmbeddedTester, TPT, Simulink Test

Need one of these disciplines on your programme?

We typically respond within one business day.

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