Sorting out the 'lemons' for safety services

摘要

Selecting a company to assess safety requirements as part of an IEC61508/6151 I/ISA 84.01 safety life cycle process can be challenging.How can you be sure that they know what they are doing and will provide the best value for money? Although this specific problem is new,the general situation in which a buyer needs a product or service and doesn't know much about the subject has been around for centuries.