A process lifecycle management (PLM) system is a software platform used to centrally manage engineering data, documentation, and workflows across the full lifecycle of a process plant or safety instrumented system. The term PLM originates from the manufacturing and product development industries — where platforms like Siemens Teamcenter, PTC Windchill, and Dassault Systems ENOVIA were built to manage product design data — and has since been adopted in the process industry to describe tools that manage safety lifecycle documentation. PLM is not defined in IEC 61511-1 and is not a regulatory term; it is a software industry category that practitioners apply to satisfy IEC 61511’s functional safety management and documentation control requirements. It would be a part of functional safety management (FSM).
PLM systems also support management of change workflows by routing proposed modifications to affected documents for review and approval before implementation. For facilities with many safety instrumented functions, a PLM system provides the document control infrastructure needed to satisfy IEC 61511’s functional safety management requirements and to demonstrate that the safety lifecycle has been properly executed during audits, functional safety assessments (FSA), and pre-startup safety reviews.
Key Points
- PLM systems manage documentation across each IEC 61511 lifecycle phase — from hazard studies and SIL determination through SIS design, commissioning, and proof testing — providing version control, approval workflows, and a complete audit trail.
- Unlike a basic document management system, a PLM platform links documents to specific engineering objects. It is a step above a simple, here is the latest revision of the SRS.
- Common PLM platforms used in the process industry include Siemens Teamcenter, PTC Windchill, Hexagon PPM (SmartPlant), and Bentley AssetWise, though some facilities use purpose-built safety lifecycle management tools.
Example
A refinery operator uses a PLM system to manage its SIS documentation library. When a process change triggers a review, the PLM system routes the updated cause-and-effect matrix and safety requirements specification to the functional safety engineer for approval before the change is implemented, creating an audit trail that satisfies IEC 61511 Clause 5 documentation control requirements.
Cited Sources
- IEC 61511-1:2016, Clause 5 — Functional Safety Management (documentation control requirements)
- ISA — IEC 61511 Standard