Independent Safety Assessor
SIL CONCEPTION AND SIL ASSESSMENT
(SIL – Safety Integrity Level)
Safe operation of a product or system can be defined as the ability to operate under certain operating conditions in the absence of an unacceptable risk of systematic or random failures.
Safety Integrated Level (SIL) is defined in 4 levels – from 1 to 4 (base level 0 is not taken into account), and Safety Integrity Level with the highest figure has the highest level of safety integrity of the product or system and consequently reduce the degree of risk.
WHY SERTIFICATION OF THE SAFETY INTEGRITY LEVEL IS NECESSARY
The purpose of assessing and certifying a product or a system for safety integrity level, is to establish а confidence of all stakeholders to guarantee the compliance of the requirements, set out in the applicable standards.
Objectively, this is related with requirements of the local or international regulatory authorities, of customer or of railway companies’ management (infrastructure managers or railway undertakings). In these cases, the product or system cannot be implemented in the railway system without the presence of a document proving the achievement of the required safety integrity level.
Certifying for Safety Integrity Level is a process, which:
- Allows to begin of assessment in the early stages of design / development, which reduces the risk of unacceptable deviations at a later stage of the life cycle;
- Ensures compliance with the requirements of the international standards, regarding safety in the railway system;
- Provides an objective assessment by a competent assessor, as an independent third party.
TINSA Ltd. is an accredited Independent Safety Assessor, with Certificate of Accreditation № 9 ОСП, according to БДС EN ISO/IEC 17065:2012, issued by the Bulgarian Accreditation Service Executive Agency, for conformity assessment of the railway system’s products for Safety Integrity Level (SIL), according to standards:
- EN 50126-1;
- EN 50126-2;
- EN 50128;
- EN 50129;
- EN 50159.