The condition-intelligence layer of the AGL Asset Lifecycle Guide. This division connects directly with the AGL Inspection Handbook, but stays focused on asset condition, lifecycle decisions, risk and strategic planning — the Inspection Handbook carries the detailed field procedures, inspection methods, checklists and inspection frequencies.
The question this division answers — What is the current condition of the AGL asset, how is that condition changing, what does it mean for risk and reliability, and when should intervention, rehabilitation or replacement be considered?
Handbook boundary — Division 15 answers what did we find and what does it mean for the asset's lifecycle. The AGL Inspection Handbook answers how, exactly, is each inspection carried out in the field — methods, checklists, frequencies and step-by-step procedures live there, not here.
Division 15 is the bridge between field inspection and the higher-level lifecycle framework — it turns raw inspection observations into condition scores, trends and risk-informed intervention recommendations that feed Asset Health, Reliability, Lifecycle Cost and Replacement Planning.
Defines what assets need to be inspected, what condition information is required, how frequently assessment should occur, and how inspection results will support lifecycle decisions.
Establishes the starting condition of the asset. It creates the baseline against which future deterioration can be measured, and should link directly with Division 07 — Commissioning & Baseline Asset Performance.
Determines how asset condition changes over time. The objective is to identify deterioration before it becomes a major failure.
Should be initiated when normal inspection identifies a significant concern. The result should support a clear lifecycle recommendation.
The first-level condition assessment. Results should be recorded against the individual asset ID.
Evaluates the electrical health of the asset. Depending on asset type, assess insulation condition, continuity, earthing, connections, terminations, connector condition, wiring, cable condition, electrical protection, abnormal heating and electrical test results.
These should be considered as related elements when assessing electrical condition — a defect at one point can mask or mimic a defect elsewhere in the same circuit.
Concerns the physical and mechanical integrity of equipment.
Optical condition is particularly important for AGL. Where applicable, condition assessment should be supported by actual photometric measurements.
A fixture may appear physically acceptable while its optical performance has deteriorated. Physical condition alone should not be treated as a complete indicator of AGL performance.
Applies particularly to assets with physical supports, mounting systems or civil interfaces. Structural deterioration should be evaluated according to its potential safety and operational consequence.
Identifies the environmental factors affecting asset deterioration.
Two identical assets may have substantially different service lives because they operate in different environmental conditions. Environmental condition should therefore become an input to lifecycle planning.
Corrosion should be assessed as a specific condition parameter where relevant.
Depending on severity and risk.
An important condition indicator for AGL electrical equipment. Moisture findings should be connected with electrical condition and failure history.
Condition should not be assessed solely from physical appearance. Performance assessment determines whether the asset continues to deliver its intended function.
Condition assessment should evaluate both physical condition and functional performance.
A standardized condition grading system should be established. A simple five-level framework can be used if it matches the organization's approved methodology.
| Grade | Condition | Lifecycle Interpretation |
|---|---|---|
| 1 | Excellent | Normal operation |
| 2 | Good | Minor deterioration |
| 3 | Fair | Monitor / planned intervention |
| 4 | Poor | Corrective action / rehabilitation |
| 5 | Critical | Immediate intervention / replacement assessment |
The grade should be evidence-based and supported by inspection results, testing, performance, defects, history and risk.
Inspection findings should be classified consistently.
Converts multiple inspection observations into a structured asset-health indicator.
The calculation methodology should be standardized rather than allowing each inspector to interpret scores differently.
Every significant inspection should be retained as part of the asset lifecycle record. This makes deterioration visible over time.
Condition trends are more valuable than a single inspection result — they indicate the direction and rate of deterioration.
| Year | Condition Grade |
|---|---|
| 2026 | 2 |
| 2027 | 2 |
| 2028 | 3 |
| 2029 | 3 |
| 2030 | 4 |
Inspection should ultimately support lifecycle decisions — should the asset continue operating, be monitored, repaired, rehabilitated, upgraded or replaced?
| Condition | Criticality | Recommended Strategy |
|---|---|---|
| Good | Low | Continue normal management |
| Good | High | Continue + enhanced monitoring |
| Fair | Low | Planned maintenance |
| Fair | High | Condition monitoring + intervention planning |
| Poor | Low | Repair / rehabilitation assessment |
| Poor | High | Priority intervention |
| Critical | Any | Immediate risk assessment / intervention |
This should be integrated with Division 03 — Asset Criticality & Risk Assessment rather than used independently.
Division 15's condition parameters apply differently across AGL asset classes — each class has a set of condition dimensions that matter most.
| Asset Class | Primary Condition Focus |
|---|---|
| Runway Fixtures | Physical, optical (lens/housing/alignment), electrical (connector/isolation transformer), photometric performance |
| Taxiway Fixtures | Physical, optical performance, mechanical, electrical, mounting, connector, transformer |
| PAPI | Optical condition, structural condition, alignment, housing, electrical condition, performance, supporting equipment |
| CCR | Electrical condition, control condition, cooling/ventilation, mechanical condition, connections, alarm condition, output performance, historical failures |
| Isolation Transformers | Physical condition, electrical condition, insulation condition, connections, moisture, corrosion, failure history |
| Primary Cable | Insulation condition, test results, failure history, joint/termination condition, moisture-related deterioration, environmental exposure |
| Airfield Signs | Structural condition, housing, mounting, lighting performance, optical condition, electrical condition, corrosion |
| ALCMS | Hardware condition, software/support status, communication reliability, alarm functionality, control performance, obsolescence, manufacturer support |
The 19 topics kept exactly as the condition-intelligence structure, each mapped to the primary question it answers.
| No. | Topic | Primary Question |
|---|---|---|
| 01 | Asset Inspection Strategy | What needs inspecting, and how often? |
| 02 | Initial Condition Assessment | What is the asset's starting condition? |
| 03 | Periodic Condition Assessment | How is condition changing over time? |
| 04 | Detailed Condition Assessment | What deeper investigation does a concern warrant? |
| 05 | Visual Inspection | What does the asset physically look like? |
| 06 | Electrical Condition | Is the electrical system healthy? |
| 07 | Mechanical Condition | Is the mechanical integrity intact? |
| 08 | Optical Condition | Is the light output and optical performance acceptable? |
| 09 | Structural Condition | Are supports, mounts and foundations sound? |
| 10 | Environmental Condition | What environmental factors are driving deterioration? |
| 11 | Corrosion Assessment | How severe and how progressive is corrosion? |
| 12 | Moisture Assessment | Is moisture compromising the asset? |
| 13 | Performance Assessment | Does the asset still deliver its intended function? |
| 14 | Condition Grading | What standardized grade applies? |
| 15 | Defect Classification | How significant is this finding? |
| 16 | Asset Condition Score | What single indicator summarizes asset health? |
| 17 | Inspection History | What is the asset's full inspection record? |
| 18 | Condition Trend | Which direction, and how fast, is condition moving? |
| 19 | Inspection-Based Replacement Recommendation | Continue, repair, rehabilitate, or replace? |
The mandatory outputs of Division 15.
Division 15 should remain the condition-intelligence layer. It answers what the current condition of the asset is, how that condition is changing, what it means for risk and reliability, and when intervention, rehabilitation or replacement should be considered — it does not hold the detailed field procedures, checklists or inspection frequencies, which belong to the AGL Inspection Handbook.
Inspection is not simply the process of finding defects; it is the systematic collection of evidence required to understand asset condition, deterioration, risk, remaining life and the appropriate lifecycle intervention. Physical condition alone is never a complete indicator — optical, electrical and performance data must be assessed together, and condition grades must always be evidence-based.
This makes Division 15 the principal bridge between the AGL Inspection Handbook and the higher-level Asset Health, Reliability, Lifecycle Cost and Replacement Planning framework — turning field observations into structured, trend-based, risk-informed lifecycle decisions.
Quick answers about Asset Inspection & Condition Assessment in the AGL Asset Lifecycle Guide.
Division 15 is the condition-intelligence layer. It covers 19 topics on inspection strategy, condition assessment, defect classification, condition scoring, trend analysis and inspection-based replacement recommendations.
It defines which assets need inspection, what condition information is required, how often assessment should occur and how results will support lifecycle decisions. It is driven by factors such as criticality and safety significance.
Initial assessment establishes the starting condition and links to Division 07. Periodic assessment tracks how condition changes over time so deterioration is identified before it becomes a major failure. Detailed assessment is initiated when normal inspection identifies a significant concern, such as repeated failures or severe deterioration.
Division 15 covers visual, electrical, mechanical, optical, structural and environmental condition, plus corrosion and moisture assessment. Optical condition should be supported by photometric measurements where applicable.
Condition should not be assessed solely from physical appearance. Performance assessment determines whether the asset continues to deliver its intended function, using light output, photometric performance and electrical performance.
A standardized condition grading system should be established, and a simple five-level framework can be used if it matches the organization's approved methodology. Defects are classified consistently, for example as an observation requiring monitoring, a defect requiring corrective action, or a major defect.
The condition score converts multiple observations into a structured asset-health indicator. Inspection history retains every significant inspection so deterioration is visible over time, and condition trends are more valuable than a single result because they show the direction and rate of deterioration.
Inspection should ultimately support the lifecycle decision: continue operating, monitor, repair, rehabilitate, upgrade or replace. Division 15 connects with the AGL Inspection Handbook but stays focused on condition, lifecycle decisions, risk and strategic planning.
Effective AGL asset management starts with a structured inspection regime that catches deterioration early.
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