What is the scope of the ISAs task and how deep is their involvement, for example does he/she have to do witness testing?
The ISA should assess the safety product evidence so that he/she is sufficiently confident to make a clear statement that the safety requirements have or will be met. This clear statement may be an endorsement of the safety case or some other clear stamp of approval. The severity of the hazard or the safety risk of the project determines the depth of the ISA role. For example the ISA may judge that witnessing the testing of a particular safety property with high risk or severe consequence is essential to establishing his/her confidence in the evidence. However, witnessing the testing would be only one part of the evidence that the ISA may examine in order to come to a judgement on the veracity of a particular test. The ISA may expend analysis and assessment effort reviewing the test objectives, specification and test environment. The International standard EN 61508 gives little guidance on the extent of ISA involvement but does make strong recommendations on the degree of independence
Related Questions
- For lenders/vendors already development and/or testing to implement the initial ULDD specification, how does the reduced scope of the ULDD requirements impact this work?
- What is the scope of the ISAs task and how deep is their involvement, for example does he/she have to do witness testing?
- What forms of payment does ISA accept for the application fee and/or private testing fee?
