The forward-looking technology, supportability and lifecycle-risk management layer of the AGL Asset Lifecycle Guide. Division 18 identifies assets, components, software and technologies that are approaching or have reached a condition where continued support, spare availability, maintainability, reliability or future operation may be compromised — so that obsolescence is managed before it becomes an operational failure.
The question this division answers — Which of our assets, components, software and technologies are approaching a point where support, spares, maintainability or reliability can no longer be guaranteed — and what should we do about it before that gap becomes an operational failure?
Division 18 draws on Procurement, Spare Parts, Warranty & Supplier Management, Refurbishment and Technology Upgrade to build a single forward-looking view of lifecycle risk. Its outputs feed directly into planned Replacement and Technology Migration, rather than emergency replacement.
The systematic process of identifying assets or components that may become difficult to support — before that difficulty turns into an unplanned failure.
Product discontinuation occurs when a manufacturer stops producing a particular model or product.
Manufacturer discontinuation is broader than individual product discontinuation. A manufacturer may exit a product line, stop supporting a technology, close a service facility, withdraw from a market, stop providing technical support or software updates, or reduce spare availability.
Even if the equipment itself is technically functional, loss of manufacturer support can increase lifecycle risk on its own — independent of the asset's physical condition.
Particularly important for AGL because an operational asset can become difficult to maintain even when the main equipment remains functional.
Occurs when an existing technology becomes outdated relative to available and supportable alternatives — legacy lighting technology, legacy CCR control, legacy communication, legacy monitoring, legacy control platforms, older electronic systems.
Technology should not be declared obsolete solely because a newer technology exists. The assessment should consider whether the existing technology remains fit for purpose and supportable.
Software can become obsolete independently of the physical equipment it runs on.
A physically healthy system may become difficult to operate or maintain because its software platform is no longer supported.
Control systems require dedicated obsolescence management because they can have long operational lives while their electronics and software evolve rapidly.
Legacy CCRs should be managed as a specific asset population rather than assessed only at the point of individual failure.
Legacy AGL fixtures may present obsolescence risks involving light source, LED modules, drivers, optical components, housing components, connectors, replacement parts and manufacturer support.
A large installed population of a discontinued fixture should be treated as a portfolio-level obsolescence risk, not merely individual equipment failures.
Isolation transformers can remain physically serviceable for long periods, but their replacement availability and compatibility should still be monitored.
Cable systems generally present a different form of obsolescence risk compared with electronic equipment.
For cables, physical deterioration and supportability should be assessed separately. A cable may be technically obsolete, physically degraded, supportable, or non-supportable — these are different lifecycle conditions.
Every identified obsolete or potentially obsolete asset should be assessed for lifecycle risk.
A last-time buy may be appropriate when a manufacturer announces product discontinuation but replacement migration cannot immediately be implemented.
Required quantity vs. available quantity vs. expected future consumption. The last-time buy should be based on a documented forecast rather than simply purchasing the maximum quantity available.
When an existing product becomes obsolete, an alternative should be technically evaluated before adoption.
Form-factor similarity does not automatically mean technical interchangeability.
Obsolescence should feed into planned asset replacement rather than emergency replacement.
The controlled transition from legacy technology to a supported technology platform.
Migration should be planned before the legacy system reaches an operationally critical support condition.
The Obsolescence Register should be the central management record for Division 18.
| Status | Meaning |
|---|---|
| O0 — Current | Fully supported |
| O1 — Aging | Technology aging but supported |
| O2 — At Risk | Support/spares becoming uncertain |
| O3 — Discontinued | Product no longer manufactured |
| O4 — Unsupported | Manufacturer support unavailable |
| O5 — Critical Obsolescence | Immediate lifecycle intervention required |
Recommended strategy by obsolescence status and asset criticality.
| Obsolescence Status | Asset Criticality | Recommended Strategy |
|---|---|---|
| Current | Low | Routine monitoring |
| Aging | Low | Monitor technology |
| Aging | High | Support/spare assessment |
| At Risk | Low | Alternative evaluation |
| At Risk | High | Mitigation programme |
| Discontinued | Low | Last-time buy / alternative |
| Discontinued | High | Planned migration/replacement |
| Unsupported | Low | Replacement planning |
| Unsupported | High | Priority replacement |
| Critical Obsolescence | Any | Immediate lifecycle action |
All 17 topics at a glance, and the guiding question each one answers.
| # | Topic | Guiding Question |
|---|---|---|
| 01 | Obsolescence Identification | What assets or components may become difficult to support? |
| 02 | Product Discontinuation | Has a manufacturer stopped producing this model or product? |
| 03 | Manufacturer Discontinuation | Has the manufacturer withdrawn from the product line, technology or market? |
| 04 | Spare-Part Obsolescence | Can the main equipment still be maintained even if it keeps running? |
| 05 | Technology Obsolescence | Is the existing technology still fit for purpose and supportable? |
| 06 | Software Obsolescence | Is the software platform still supported, independent of the hardware? |
| 07 | Control-System Obsolescence | Are the electronics and software of the control system still current? |
| 08 | Legacy CCR Management | How should the legacy CCR population be managed as a group? |
| 09 | Legacy Fixture Management | Is a discontinued fixture population a portfolio-level risk? |
| 10 | Legacy Transformer Management | Is replacement availability and compatibility still monitored? |
| 11 | Legacy Cable Management | Is the cable technically obsolete, physically degraded, or both? |
| 12 | Obsolescence Risk Assessment | What is the combined lifecycle risk of this obsolescence condition? |
| 13 | Last-Time-Buy Strategy | How much should be purchased before the product disappears? |
| 14 | Alternative-Product Evaluation | Is the proposed alternative actually interchangeable? |
| 15 | Replacement Planning | How does obsolescence feed into planned, not emergency, replacement? |
| 16 | Technology Migration | How is the transition to a supported platform controlled? |
| 17 | Obsolescence Register | Where is every obsolescence risk tracked to closure? |
The mandatory outputs of Division 18.
Obsolescence should be managed before it becomes an operational failure. Division 18 should remain forward-looking — it identifies technology, equipment, component and support risk while there is still time to plan a response, rather than reacting once a failure has already occurred and no spare or alternative exists.
Division 18 connects across the lifecycle: Division 05 — Procurement selects supportable products, Division 13 — Spare Parts monitors spare availability, Division 14 — Warranty & Supplier monitors manufacturer support, Division 16 — Refurbishment assesses life-extension options, and Division 17 — Technology Upgrade evaluates modern alternatives — all of which feed into Division 18's risk register and mitigation strategy.
Mitigation options range from simple monitoring through strategic spares, last-time buy, alternative product, refurbishment or retrofit, up to full technology migration or replacement — selected by obsolescence status and asset criticality, not by default to the most expensive option.
Quick answers about Obsolescence Management in the AGL Asset Lifecycle Guide.
Division 18 is the forward-looking technology, supportability and lifecycle-risk management layer. It covers 17 topics on obsolescence identification, discontinuation, legacy CCR/fixture/transformer/cable management, last-time-buy strategy, technology migration and the obsolescence register.
It is the systematic process of identifying assets or components that may become difficult to support before that difficulty turns into an unplanned failure. It looks at discontinued products, aging equipment and unsupported technology.
It covers product discontinuation, manufacturer discontinuation, spare-part obsolescence, technology obsolescence, software obsolescence and control-system obsolescence. Software can become obsolete independently of the physical equipment it runs on.
An operational asset can become difficult to maintain even when the main equipment remains functional. Discontinued, long-lead, proprietary or no-alternative parts are the main concern.
Legacy CCRs should be managed as a specific asset population rather than assessed only when an individual unit fails. Fixtures, transformers and cables have their own topics, and cable systems generally present a different form of obsolescence risk than electronic equipment.
Every identified obsolete or potentially obsolete asset should be assessed for lifecycle risk, considering criticality, failure probability and consequence, spare availability, lead time and manufacturer support.
A last-time buy may be appropriate when a manufacturer announces discontinuation but migration to a replacement cannot immediately be implemented. It is sized using installed population, annual consumption, failure rate and expected remaining life.
Obsolescence should feed planned replacement rather than emergency replacement, and alternative products should be technically evaluated before adoption. Technology migration is the controlled transition from legacy technology to a supported platform, and the Obsolescence Register is the central management record for the division.
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