Phase/activity hazard analysis

The regulation requires preparation of an activity hazard analysis (AHA) before beginning each phase of work. This analysis addresses the hazards for each activity performed in the upcoming phase. It presents procedures and safeguards necessary to eliminate the hazards or reduce the risks to acceptable levels. 

Operating and support hazard analysis (O SHA) As described in NHB 1700.1(V1-A) and this document. The O SHA is to identify hazards and recommend risk reduction alternatives in procedurally controlled activities during all phases of intended use (NSTS 22254). 

A phase hazard analysis may be performed for those phases of the project for which the project hazard analysis has identified the need for further analysis, and for those phases of the project for which methods or site conditions have changed since the project hazard analysis was completed. The phase hazard analysis is performed prior to the start of work on that phase of the project and is expanded, based on the results of the project hazard analysis, to provide a more thorough evaluation of related work activities and site conditions. As appropriate, the phase hazard analysis should include... 

All j obs, processes, or phases of activity are analyzed using the appropriate hazard analysis system. 

In September 1963, the USAF released MIL-S-38130. This specification broadened the scope of the system safety effort to include aeronautical, missile, space, and electronic systems. This increase of applicable systems and the concept s growth to a formal Mil-Spec were important elements in the growth of system safety during this phase of evolution. Additionally, MIL-S-38130 refined the definitions of hazard analysis. These refinements included system safety analyses system integration safety analyses, system failure mode analyses, and operational safety analyses. These analyses resulted in the same classification of hazards, but the procuring activity was given specific direction to address catastrophic and critical hazards. 

The first step of the analysis is the hazard identification. This consists of determining which hazards affect the fishing vessel s activities under consideration using brainstorming techniques involving trained and experienced personnel. In the HAZID phase, various safety analysis methods described in Chapter 3 may be used individually or in a combination to identify the potential hazards. 

Job Hazard Analysis. Relate how you review jobs, processes, and/or interaction of activities to determine safe work procedures. (Not to be confused with self-inspections.) Include procedures or guidance techniques used in conducting job hazard analysis. In construction, relate phase-planning, and describe how results are used in training employees to do their jobs safely. Also, how are results used in planning and implementation of your hazard correction and control program ... 

First Phase The first phase is reviewing and improving operating practices. It is important to document the existing processes that create hazardous wastes. Documentation activities should compile management policies and procedures, employee training, maintenance practices, purchase of hazardous materials, risk analysis, and process decision-making. 

Typically, two iterations of each analysis should be undertaken to cover human requirements specification and realisation phases and, as the analyses become more focused, the results fiom each one will inform and focus the other. In addition, diese HF activities are entirely complementary as CTA and HEA are bottom-up and top-down analysis techniques respectively (from a hazard to human event perspective).This combination of top-down and bottom-up analyses significantly increases the probability of identifying inconsistencies in the individual techniques and thus enhances safety assurance. 

Worksite analysis is the process of identifying hazards related to a project, process, or activities at the worksite. Identify hazards before determining how to protect employees. In performing worksite analyses, consider not only hazards that currently exist, but also hazards that could occur because of changes in operations or procedures or because of other factors, such as concurrent work activities. First, perform hazard analyses of all activities and projects prior to the start of woik, determine the hazards involved with each phase of the project, and perform regular safety and health site inspections. Second, require supervisors and employees to inspect their work areas prior to the start of each shift or new activity, investigate accidents and near-misses, and analyze trends in accident and injury data. 

An analysis shall be carried out on the impact on functional safety as a result of the proposed decommissioning activity. The assessment shall include an update of the hazard and risk assessment sufficient to determine the breadth and depth that subsequent safety life-cycle phases shall need to be re-taken. The assessment shall also consider... 

The overall life cycle discussions in the standard mainly covered in this main Clause 7, having 17 major sub-clauses. Now coming back to main life cycle phases in Fig. VI/4.0.2-1, it is seen that the first part of the safety life cycle is basically the analysis part comprising concept, scope for the system/EUC, hazard/risk analysis, creation of overall safety requirements, and identification of specific safety functions to prevent the identified hazards safety requirements allocation. The middle part is realization activities (Clause 7.10) as detailed in Figs. Vl/4.1.4-1 and Vl/4.1.4-2, are dealt with in Parts 2 and 3 discussions. The next part of the life cycle is related to installation and commissioning (Clause 7.13). Then comes the validation (Clause 7.14), operation and maintenance (Clause 7.15), modification, retrofit (Clause 7.16), and finally, decommissioning (Clause 7.17). 

In accordance with lEC 61508/61511, the overall required safety management and proper technical activities relates with all documentation for SIS are summarized in safety life cycle. The purpose of analysis phase is to identify hazards and assess safety requirements of SIS. Safety Requirements Specification (SRS) of SIS should contain critical information which includes functional description... 

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