System analysis and renovation services

CLEARSY’s expertise in complex customised projects.

CLEARSY offers a range of services and products across various fields: railway, nuclear, defense, automotive, medical, and industrial. This expertise includes a dedicated service for system studies and renovation. CLEARSY provides custom solutions to address complex software and electronic issues related to critical systems such as obsolescence management, modernization or evolution of equipment for operational continuity, system upgrades, and safety demonstrations.

Key challenges

CLEARSY identifies four major strategic areas:

• Critical systems knowledge: gaining in-depth understanding of complex equipment design, identifying the properties necessary for safety, and retrieving reasoning sometimes lost over time.
• Independence from dominant manufacturers: acting as a trusted third party, able to challenge architectures, validate compliance, and provide an impartial second opinion.
• In-Service Support : managing obsolescence, applying reverse engineering, and ensuring maintenance to extend the lifespan of systems.
• Evolution and modernization: supporting equipment upgrades, adding new functionalities, achieving compliance with updated standards, and improving reliability and maintainability.

A structured and tooled Methodology

CLEARSY’s approach is based on a rigorous methodology: documentation collection, interviews with operators and maintainers, feasibility studies, specification reconstruction, and comparative testing between old and new equipment.

This process is supported by internal tools: signal capture devices, environment simulators, and an electronics department capable of adapting any type of connector/interfaces. Additionally, the use of formal modeling tools ensures full understanding of the system under study and its environmental constraints. Finally, the method relies on versatile specialists, experienced in both legacy and modern technologies.

A Comprehensive Offering

CLEARSY operates across the entire product life cycle:

• Study/Analysis: definition of requirements, risk analysis, and safety standards.
• Custom development: handling obsolescence, plug’n play solutions, adding safety loops, and reverse engineering.
• Verification and validation: automated test benches, diagnostic tools (lab or field), factory and on-site tests, qualification, and certification.
• Support: continuous improvement, maintenance, training, and customer assistance.

Software and Hardware Expertise

CLEARSY has strong expertise in safety-critical software compliant with EN50126, EN50128, EN50129, EN5012X and EN61508 standards, covering complex algorithms such as localization or braking curve calculation in the railway domain,…. The proposed solutions reach safety integrity levels from SIL2 to SIL4 and rely on formal methods, especially the B method.

On the hardware side, the offering includes the CLEARSY Safety Controller (based on the SIL4-certified CLEARSY Safety Platform), existing industrial safety PLCs, customized communication protocols, and communication gateway design.

Project References

Several customer projects illustrate these capabilities:

• Reverse engineering of an obsolete metro system in Kuala Lumpur, including series production and maintainer training.
• Study of traction logic for a metro operator, leading to the redefinition of necessary and sufficient safety constraints.
• Upgrade of an obsolete communication gateway for drones, ensuring protocol compatibility and industrialization.
• Renovation of critical control-command systems in less than 18 months, with reproducibility and immediate deployment.
• Formal proof projects for Paris metro RATP, New York metro MTA, and French railway operator SNCF, guaranteeing interoperability and system safety.

Differentiating advantages

CLEARSY’s offer provides four major advantages: in-depth expertise in safety-critical systems, certified and proven technological bricks, a flexible and custom approach adapted to each client’s needs, and a commitment to results—including certification by an independent assessor, rapid prototyping, and compliance with cost constraints.

Download CLEARSY System analysis and renovation services offer presentation