Security, managing equipment modifications

Management Operating policies and procedures Training for vapor release prevention and control Audits and inspections Equipment testing Maintenance program Management of modifications and changes to prevent new hazards Security... 

The situation becomes more complicated when full lifecycle and maintenance activities are considered. Cyber security applies to all equipment suppliers and contractors, and also to any software maintenance and modification activities that may be done on the site to digital systems. In addition to the plant control and protection systems, there will be document management systems, work control systems and site access control systems, all of which have some relevance to safety. Hence Fig. 3.2 shows what a typical simplified information security architecture for an industrial plant site might look like. This shows a somewhat higher degree of complexity than Fig. 3.1. 

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