Functional safety plan

4 Provisional safety study and collection of safety data 

To these stages are added the classic stages of each IT project, namely analysis of user requirements, definition of requirements, functional analysis, definition of external interfaces, definition and design of the architecture, development, on-site installation, functional testing, etc. A classical V cycle was followed. 

The functional safety plan is intended to describe the application of the lEC 61508 standard in the context of the project in particular, the documentation, activities, organization, and tools put in place to deal with functional safety aspects during the life cycle of system development 

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The functional safety plan shall siunmarize the scdety activities in the safety development project for lEC 62061 compliance. Together with the verification and validation plcui cuid the configuration/maintenance plan it shall cover all process and quality requirements of lEC 62061. In essence, the safety plan shall be written with the cunbition that the two m un goals can... 

The configuration management procedures shall be implemented in accordance whit the functional safety plan taking into account following ... 

Functional safety plan (See Appendix 7 of this book)... 

A functional safety plan should be in place and shall ... 

Rigour of Life-Cycle Activities Functional Safety Competence Functional Safety Plan Functional Safety Specification... 

Will provide the tasks and register format—see Chapter 2 of this book. Work Instruction xxx/006—Functional Safety Plan See Appendix 7 of this book. 

A SLCM shall provide assistance to safety development teams in specifying the management and technical activities and in management of functional safety, including role allocation, functional safety planning, safety verification and validation, and safety assessment. 

The safety lifecycle from ANSl/lSA-84.00.01-2004 (lEC 61511 Mod) was created specifically for the process industries, and thus many requirements are tailored for process applications. Note that there is an emphasis on managing functional safety on the structure and planning of the safety lifecycle and on verification throughout the entire lifecycle. 

The lEC 61511 standard and the lEC 61508 standard emphasize good management of functional safety, which includes the application of a good plan and verification activities for each step of the safety lifecycle. These steps are shown as overtly drawn boxes on each side of the Figure 1-5 lifecycle diagram. 

The concept of the "well designed system" was also presented in Chapter 3. A simplistic definition of such a system would be one where aU the techniques and measures presented in our functional safety standards to prevent systematic failures are followed. These techniques and measures are planned to significantly reduce the chance of a systematic fault to a tolerable level. Therefore, systematic failure rates caused by human error including failures due to installation errors, failures due to calibration errors and failures due to choosing equipment not suited for purpose are not included in the calculation. 

Have all personnel received a safety and emergency procedures brief Has a project health and safety plan been prepared and implemented Have emergency contingency plans been put in place and posted Have alarm systems been functionally tested ... 

It could point out a recommended Functional Safety Standard and specify a minimum safety integrity level for controls and supervisions that monitor the mine hoist against its most critical hazardous events. These controls and supervisions would then be developed and designed according to this standard management plan and its required process activities. 

In lEC 62061 it s possible for a SPECS supplier to self-assess a Safety Related Electrical Control System, but when developing a safety system such as SIL3 Hoist Monitor or the SIL3 Hoist Protector the use of a 3rd party organization to make a Functional Safety Assessment against lEC 62061 2005+Al 2012 is recommended. The 3rd party organization should be involved already when the development project starts, when the safety plan is established. 

Housekeeping is the routine care and cleaning that needs to be acted on daily in order for a facility to function safety and properly. In Occupational Safety and Health Administration (OSHA) regulation 29 CFR 1910.38 (b) (3), it states that the employer shall control accumulations of flammable and combustible waste materials and residues so that they do not contribute to a fire emergency. Additionally, housekeeping procedures shall be included in the written fire prevention plan. Additionally, 29 CFR 1926.25 similarly states the need for housekeeping activities at construction locations. Common injuries due to poor housekeeping include slips, trips, and falls. 

NOTE 2 The following should be considered when planning a functional safety assessment ... 

The stages in the safety life cycle at which the functional safety assessment activities are to be carried out shall be identified during safety planning. 

SIS operation and maintenance To ensure that the functional safety of the SIS is maintained during operation and maintenance 16 SIS requirements SIS design Plan for SIS operation and maintenance Results of the operation and maintenance activities... 

The safety requirements shaii be derived from the allocation of safety instrumented functions and from those requirements identified during safety planning. 

One option for the management of functional safety is developing and using a roles-and-responsibilities matrix. The attached roles-and-responsibilities matrix is provided for illustration purposes only. It is typically developed for each specific project. In the roles-and-responsibilities matrix, each clause or step is divided into four activities - planning, inputs, outputs, and verification. 

Adequate planning exists to ensure that the functional safety objectives allocated to the application software are met -... 

The plans for implementation needing further functional safety assessments. 

The functional safety strategy planning, procurement, development, integration, verification, validation, and modification in line with the requirement of intended SIP. 

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