The studies carried out by CLEARSY experts concern systems or software with operating safety constraints.
CLEARSY offers its expertise to manufacturers, principals and certification authorities who need to develop, validate, approve or certify their systems and software
This safety study process, often called RAMS study, is centred around four main study points:
- The reliability study allows the system/equipment concerned to be given a guaranteed operating time before failure (MTBF). This operating time must be as close as possible to reality. Reliability is determined in a predictive manner, and is usually based on values derived from experience.
- The availability study makes it possible to determine, according to the reliability results, the quality of the service provided by the system/equipment.
- The maintainability study determines the ability of the system to be restored to working order.
- The safety study defines the ability of a system/equipment to guarantee, throughout its operating life, a constant frequency of occurrence of an event identified as dreaded, i.e. an event that could cause the injury or death of one or more persons.
Method of analysis
These operational safety studies are carried out in parallel with the system/equipment development cycle and use for each of the development phases, analysis methods such as
- Preliminary Hazard/Risk Analysis (PHA/RRA)
- Operational Risk Analysis (ORA)
- Cause tree analysis
- Markov graph
- Common Mode Analysis (CMA)
- Failure Modes, Effects and Criticality Analysis (FMECA)
THE BASIC TECHNIQUES OF CLEARSY’S CONSULTANTS FOR CONDUCTING OPERATIONAL SAFETY ANALYSIS ARE
– Safety analysis
– Demonstration and safety analysis
CLEARSY SUPPORTS YOU IN YOUR ACTIVITIES:
– Assistance with approval/certification
– Safety management
– Production of safety files
CLEARSY APPLIES ITS EXPERTISE IN OPERATIONAL SAFETY TO THE FOLLOWING SECTORS
– Surface transportation industry (rail, automotive)
– Energy and nuclear
– Information systems
– Industrial automation
CLEARSY EMPLOYEES ARE ALSO RECOGNISED AS QUALIFIED CERTIFER ASSESSORS:
– Controlling and signalling” for the software operational safety
– Controlling and signalling” for the safety electronics
– Control and command and signalling” for the railway signalling systems.
FOR A RETURN ON INVESTMENT THAT CAN BE ASSESSED IN TERMS OF :
– Reduction in late failures
– Gains in validation (improved testability)
– Faster convergence (quality of implementation)
– Improved capitalisation of knowledge concerning proven software.
EXAMPLES OF PROJECTS IN OPERATIONAL SAFETY
– Development of safety software for the Val de Roissy using the B Method
– Coppilot: platform screen doors control system