Asset

A comprehensive, structured inventory of all physical assets within an organization's scope of responsibility, containing essential information for each asset including unique identifier, description, location, classification, design data, material specification, operating conditions, and current status. The asset register is the single source of truth for the asset population and the foundation of all integrity management activities.

A structured, multi-level organization of assets that reflects the functional and physical relationships between equipment items, from the site level down to maintainable components. A typical hierarchy follows: Site > Plant > Unit > System > Equipment > Component. Asset hierarchies enable roll-up of reliability data, cost allocation, and maintenance planning at different organizational levels.

A position in the asset hierarchy that describes a function or location within a technical system, independent of the specific physical equipment installed at that position. Functional locations are permanent — they represent where a function is performed — while the equipment occupying that location may change over time. This separation enables tracking of maintenance history by location even when equipment is replaced.

The complete span of an asset's existence from initial conception through design, procurement, construction, commissioning, operation, maintenance, modification, and eventual decommissioning and disposal. Asset lifecycle management optimizes the total cost of ownership by making informed decisions at each stage that consider the full remaining lifecycle, not just the immediate cost.

The assignment of a criticality ranking (typically A, B, or C) to each equipment item based on the consequences of its failure across safety, environmental, production, and maintenance cost dimensions. Criticality classification determines the level of engineering attention, inspection rigor, maintenance strategy, and spare parts investment appropriate for each asset.