A product lifecycle management (PLM) system is a software platform used to centrally manage engineering data, documentation, and workflows across a product’s full life-cycle. The term comes from the manufacturing and product development world — platforms like Siemens Teamcenter, PTC Windchill, and Dassault Systèmes ENOVIA were built to manage product design data — and process industry practitioners have borrowed that same tool category to manage safety life-cycle documentation instead of product designs. 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). Reminder, the “P” is not process, it is product.
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 life-cycle 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 life-cycle 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 life-cycle 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