System safety support tasks

At periodic intervals during the life cycle, OHAs are performed. The frequency is determined by the nature of the system, the projected life of the system, and the actual accident experience. Typically, the frequency of inspections and hazard analysis and control efforts is high during the early life cycle, lowest during the middle, and increasing as the end product approaches the end of its projected life. 

Other important hazard analysis and control efforts during the operating phases are accident analysis and change analysis. Hazards identified as the result of accidents and changes must be systematically analyzed and controlled to an acceptable level of risk in the same manner as those identified during design. 

Project evaluation tree (PET) analysis is recommended as the primary evaluation technique. 

The analysis and control of hazards during the disposal phase should be addressed with an operating hazard analysis, a job safety analysis (a occupational and industrial safety tool), and/or change analysis. 

System safety support tasks are those tasks, normally performed by the safety staff, required to support and maintain system safety efforts, including verification and tracking, training, contracting support, and data collection and 

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Name the system safety support tasks. Who is normally responsible for conducting or coordinating these tasks ... 

This technique is applied in support of large system safety programme, when extensive system safety-related tasks are required. 

Air Force top management support of system safety has not gone unnoticed by contractors. They now seem more than willing to include system safety tasks, not as window dressing but as a meaningful activity [70, pp. 5-11]. 

Planning tasks are the responsibility of line management and are normally performed by a system safety planning group, supported by the safety staff, and reviewed and approved by corporate and project management. These tasks generally involve developing requirements, policy, and criteria and are discussed in detail in Chapter 9. 

Operating and Support Hazard Analysis A system safety analytical technique (also know as the operational hazard analysis) which focuses primarily on the hazards associated with or caused/enhanced by the human/task interface of system operations. 

The safety culture and safety management system are supported by effective, comprehensive education and training. The culture of an organization has a powerful influence over employee norms, habits, and behaviors as they complete their daily assignments and tasks. 

The scope of an SSP includes hardware, software, firmware, and HSI for all system life-cycle phases. It should be noted that in addition to the core elements, an SSP also includes many program support tasks that are necessary, such as design reviews, technical review boards, SSWGs, etc. The support tasks may vary depending on the type, size, and safety-criticality of system. The SSP and organization can be tailored to a program s size, complexity, and safety-criticaUty. The SSP is planned and documented in the SSPP. 

Whereas the SSP consists of the actual people, activities, and products involved in implementing the system safety process, the SSPP is the document that formally defines the SSP tasks, products, interfaces, and milestones that will be required of the safety organization. The SSPP also defines the scope of the safety program and decision criteria to be used by the program. The SSPP should cover the essential core components of an SSP, plus all of the relevant SSP support activities that will be required. The SSP and SSPP can be tailored to fit the needs of the program based on system size, complexity, safety-criticality, funding, development schedule, and other significant constraints. 

There are many different aspects to system safety that must be considered when conducting a system safety program (SSP). The primary tasks of a SSP are to identify hazards and mitigate them to an acceptable level of risk. However, there are many secondary SSP tasks that must be performed, such as supporting the special safety requirements in the specialized areas of safety (e.g., laser safety, explosives safety, fire safety, battery safety).The system safety engineer is truly a systems engineer, and a jack-of-all-trades, who must be familiar with all aspects of the system involved, as well as all aspects of safety applicable to the system. 

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