Slide pagina Safety Assessment
Within the safety assessment activities, HINTSW – T&T Systems is able to effectively support the customers in the following activities:
– Carrying out safety analyses;
– Verification and validation (V&V) activities as an independent third party organization;
– All the preparatory activities towards safety certification.
The approach adopted by HINTSW – T&T System in the safety assessment activities is the one suggested by the IEC 61508 Standard, and by the various industry technical standards derived from it. This approach is based on the so-called "system safety"; a strong and proactive method which influences the design of safety-critical systems starting from different types of "risk analysis" and "hazard identification & analysis". The main result of safety analyses is to define a particular set of provisions and safety requirements that have to be implemented and managed throughout the system's lifecycle.
The implementation of the safety provisions and requirements using appropriate methods and techniques is the object of "safety engineering", while the hazard identification, the estimation of the associated risk, the verifications, the appraisal on the comprehensive implementation of the safety provisions and requirements are the objects of "safety assessment", that it must be in a position to formulate a judgment about the achievement of the required level of safety for the system, the equipment or machinery.
The safety analyses carried out by HINTSW – T&T Systems are based on the skill and experience of their Safety Engineers and also on the major Risk Analysis methodologies such as the "Preliminary Hazard Analysis (PHA)", the "HAZard IDentification Study (HAZID)", the "HAZard and OPerability analysis (HAZOP)", the "Failure Mode and Effects Analysis (FMEA)", the "Failure Mode, Effects, and Criticality Analysis (FMECA)", the "Fault Tree Analysis (FTA)", the "Cause-Consequence Analysis (CCA)", and more. The analysis execution mode and the produced documentation are different according to the application sector or the applicable standard; HINTSW has participated in significant projects in different application areas: railways, oil & gas, utilities and smart grid, process industry and machinery.
Verification and Validation (usually referred to by the acronym V&V) are two processes carried out in parallel to ensure that a system, an equipment or a machinery meets the safety specifications and requirements and executes the intended safety functions correctly. In safety-critical projects, standards often require that the verification and validation processes are carried out by an independent third party organization; in these cases HINTSW – T&T Systems has the skill needed to take on the role of Verification and Validation body independent from the manufacturer and/or the designer, and to formulate competent and objective opinions on the accuracy, completeness and compliance of the executed implementation; in addition HINTSW can act as an interface, neutral and competent, towards any certification body.
The support given by HINTSW – T&T Systems starts in the preliminary stages of the certification process when the feasibility studies are carried out and the project budget is set.
The timely and accurate assessment of the financial commitment necessary to achieve safety certification is crucial when setting the project's budget.
The support provided by HINTSW - T&T Systems then continues during all the lyfe cycle phases, starting from the conception phase, when the safety analysis are carried out and the system's requirements are set, to continue with the validation and installation phases and finally during the system dismantling and disposal.
The concept of a system safety life cycle has been introduced in many National and International Standards concerning the functional safety such as: ANSI/ISA S 84.00.0 2004, IEC 61508, IEC 61511, IEC EN 50126, etc. Currently the planning and implementation of a safety lifecycle are in increasing demand for the development and operation of safety-critical applications. the purpose of this request is to minimize the likelihood of introducing systematic errors in safety critical applications, so as not to impair safety.
For each phase of the safety life cycle of a system, HINTSW – T&T Systems is able to provide all the necessary support to perform the specialized activities required by safety standards.