Asset Management Glossary
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Definitions
General Asset Management Terms
Asset
Anything — tangible or intangible — that holds, or could hold, value for the organisation. In a mining or manufacturing context this typically means physical plant and infrastructure, but data, licences and contractual rights also qualify.
Asset management
The coordinated set of activities through which an organisation actually extracts value from its asset base — covering decisions, processes and capabilities, not just physical upkeep.
Asset management system
The management framework — policy, objectives, processes, governance — that runs asset management as a discipline rather than as a collection of activities.
Asset portfolio
The set of assets that fall within the scope of the asset management system — explicitly defined, not implied.
Asset register
The structured record of assets — what they are, where they are, who owns them, what attributes they carry, what condition they are in. The asset register is the operational and financial source of truth.
Asset type
A grouping of assets that share the characteristics needed to manage them in common — failure modes, maintenance regime, valuation basis.
Competence
The demonstrable ability to apply knowledge and skills to deliver the intended outcome — verified by evidence, not by job title.
Condition assessment
The structured inspection, monitoring, testing or evaluation activity through which an asset's current condition is established — and from which decisions about intervention follow.
Criticality
A ranking of how much an asset matters to the organisation — measured by what is lost if it underperforms or fails. Criticality drives where attention, capex and analytical depth are focused.
Life cycle
The full sequence of stages an asset passes through under the organisation's stewardship — from concept and acquisition through operation and maintenance to renewal or disposal.
Performance
A measurable outcome — quantitative where possible, qualitative where it has to be — that the organisation uses to judge whether the asset, the practice, or the system is doing its job.
Stakeholder
Any party — internal or external — whose interests are affected by what the organisation does with its assets, or who can affect those activities. Includes regulators, communities, employees, investors, customers and suppliers.
Value
What the organisation actually gets out of its assets — financial return, operational capability, regulatory standing, social licence, or risk reduction. Defined in advance, then measured against.
Financial Asset Management Terms
Capital Expenditure (CAPEX)
Expenditure on the acquisition, creation or enhancement of assets.
Depreciation
Decrease in value of an asset over time, particularly due to wear and tear.
Disposal Cost
Net costs of disposal of an asset, including legal costs, less any incidental revenue from disposal.
Life Cycle Cost (LCC)
Cost of an asset or its parts throughout its life cycle, while fulfilling the performance requirements.
Net Present Value (NPV)
Value of money, taking into account the effects of compounding interest over a given period.
Operating Expenditure (OPEX)
Expenditure on the operation and maintenance activities of assets.
Replacement Cost
Cost of replacing the service potential of an existing asset with a new asset.
Return on Investment (ROI)
Financial metric used to evaluate the efficiency of an investment.
Total Cost of Ownership (TCO)
Purchase price of an asset plus the costs of operation.
Whole Life Cost
All costs associated with an asset throughout its life including planning, design, acquisition, operation, maintenance and disposal costs.
Maintenance Terms
Condition-based maintenance (CBM)
Maintenance triggered by the actual condition of the asset — vibration, temperature, oil analysis, wear measurement — rather than by elapsed calendar time. Reduces unnecessary intervention and catches developing faults early.
Corrective maintenance
Work done after a fault has been detected, to bring the asset back to a state where it can do what it is supposed to do. Reactive by definition — and usually more expensive than catching the issue earlier.
Deferred maintenance
Maintenance that has been scheduled but pushed back — usually under budget pressure. Visible on the asset register as accumulating risk; tracked and reported, not absorbed silently.
Failure
The point at which an asset can no longer perform the function expected of it — partially or completely.
Maintenance
The technical, administrative and managerial work involved in keeping an asset capable of doing its job — or restoring it after it has stopped being capable.
Planned maintenance
Maintenance executed against a defined schedule, with documented procedures and records — as opposed to opportunistic or reactive work.
Predictive maintenance
Condition-based maintenance where the timing of intervention is forecast from analysis of degradation trends — using repeated measurement of the parameters that drive failure.
Preventive maintenance
Maintenance done on a predetermined schedule, or according to defined criteria, to reduce the chance of failure or performance loss before it happens.
Reliability centred maintenance (RCM)
A structured process for working out what maintenance is genuinely required for a physical asset, based on its operating context, failure modes and consequences. Filters out maintenance that does not actually reduce risk.
Total productive maintenance (TPM)
A maintenance approach where responsibility for asset condition is shared across the workforce — operators, maintainers and management — rather than parked solely with the maintenance function.
Risk Management Terms
Consequence
What actually happens to objectives when an event occurs — production loss, safety impact, financial cost, reputational damage.
Hazard
A condition or source with the potential to cause harm to people, assets or the environment.
Likelihood
How probable an event is — expressed qualitatively, with frequencies, or with quantitative probabilities depending on the data available.
Risk
The effect that uncertainty has on the achievement of objectives — including both downside (loss) and upside (missed opportunity) deviations.
Risk assessment
The combined activity of identifying risks, analysing them, and evaluating which ones warrant action — and at what level of priority.
Risk management
The set of coordinated activities through which an organisation directs and controls its exposure to uncertainty — across strategy, operations and assets.
Risk matrix
A two-dimensional tool — typically likelihood against consequence — used to position and rank risks for prioritisation and reporting.
Risk register
The working record of identified risks — owners, current rating, treatments, and monitoring status. Live document, not a one-off artefact.
Risk treatment
The action taken to modify a risk — avoid, reduce likelihood, reduce consequence, transfer, or accept — chosen deliberately and recorded.
Vulnerability
An inherent characteristic of an asset or system that makes it susceptible to a hazard — and amplifies the consequence if the hazard is realised.
Common Abbreviations
General
- AM: Asset Management
- AMS: Asset Management System
- ISO: International Organization for Standardization
- KPI: Key Performance Indicator
- SLA: Service Level Agreement
- SMART: Specific, Measurable, Achievable, Relevant, Time-bound
Financial
- CAPEX: Capital Expenditure
- OPEX: Operating Expenditure
- LCC: Life Cycle Cost
- NPV: Net Present Value
- ROI: Return on Investment
- TCO: Total Cost of Ownership
- IRR: Internal Rate of Return
Maintenance
- CBM: Condition-Based Maintenance
- CM: Corrective Maintenance
- PM: Preventive Maintenance
- PdM: Predictive Maintenance
- RCM: Reliability Centered Maintenance
- TPM: Total Productive Maintenance
- CMMS: Computerized Maintenance Management System
Reliability & Risk
- MTBF: Mean Time Between Failures
- MTTR: Mean Time To Repair
- MTTF: Mean Time To Failure
- FMEA: Failure Mode and Effects Analysis
- RBI: Risk-Based Inspection
- SIL: Safety Integrity Level
- HAZOP: Hazard and Operability Study
Performance Measures & Calculations
Reliability & Availability Measures
Availability
The proportion of time an asset is in a functioning condition.
Availability = (Operating Time / (Operating Time + Downtime)) × 100%
Mean Time Between Failures (MTBF)
Average time between consecutive failures of a repairable asset.
MTBF = Total Operating Time / Number of Failures
Mean Time To Repair (MTTR)
Average time required to repair a failed asset and return it to normal operation.
MTTR = Total Repair Time / Number of Repairs
Reliability
Probability that an asset will perform its intended function without failure for a specified period.
Reliability = e^(-t/MTBF) × 100%
Where t = time period
Where t = time period
Overall Equipment Effectiveness (OEE)
Measure of how effectively equipment is utilized.
OEE = Availability × Performance Rate × Quality Rate × 100%
Financial Performance Measures
Return on Assets (ROA)
Measure of how profitable assets are relative to total assets.
ROA = (Net Income / Total Assets) × 100%
Asset Turnover Ratio
Measure of the efficiency of asset use in generating revenue.
Asset Turnover = Revenue / Average Total Assets
Maintenance Cost per Unit
Average maintenance cost per unit of output or service.
Maintenance Cost per Unit = Total Maintenance Costs / Units Produced
Replacement Asset Value (RAV)
Current cost to replace an asset with equivalent functionality.
RAV = Original Cost × Cost Escalation Factor
Asset Utilization Rate
Percentage of time an asset is actively used for its intended purpose.
Utilization Rate = (Actual Operating Hours / Available Hours) × 100%
Net Present Value (NPV)
Present value of future cash flows minus initial investment.
NPV = Σ [Cash Flow / (1 + r)^t] - Initial Investment
Where r = discount rate, t = time period
Where r = discount rate, t = time period
Efficiency & Performance Measures
Energy Efficiency
Ratio of useful output to energy input.
Energy Efficiency = (Useful Output / Energy Input) × 100%
Capacity Utilization
Percentage of potential output that is actually achieved.
Capacity Utilization = (Actual Output / Maximum Possible Output) × 100%
Throughput Rate
Rate at which an asset processes inputs to produce outputs.
Throughput Rate = Total Output / Total Time
Planned vs Actual Performance
Comparison of planned performance targets against actual achievement.
Performance Variance = ((Actual - Planned) / Planned) × 100%
First Pass Yield
Percentage of products that pass quality requirements on first attempt.
First Pass Yield = (Good Units Produced / Total Units Produced) × 100%
Asset Performance Index
Composite measure of asset performance across multiple dimensions.
API = (Availability × Reliability × Efficiency × Quality) / 4