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Model Framework - Degradation Profile

Degradation Profiles

The Degradation Profile is the foundation of Strategic Asset Life Cycle modelling.

 

Assets typically start off as brand new (service state 0), and at some future point in time, the asset will have transitioned to end of life (service state 6).

 

To model this process we therefore define life cycle degradation profiles, simulating an asset's degradation (the way it moves from one service state to another throughout its life cycle). This is one of the most important steps in Brightly Predictor. The life cycle degradation profiles configured in Predictor describe the relationship between useful life, remaining life, service potential and native scaling (which are all assigned to a Service State) of an asset.

 

The following explains the relationship between service state, remaining life, service potential and native scale, which are all integral to configuring life cycle degradation profiles.

 

Service State is a numerical integer value between 0 to 6, which reflects the measure of the condition, performance, physical integrity, health or similar measure of an asset or asset component consistent with the International Infrastructure Management Manual (IIMM) and ISO 55000 guidelines. The life cycle degradation profile describes the relationship between useful life and remaining useful life (assigned to each Service State) of an asset. In essence, the Service State reflects where an asset or asset component is within its defined useful life at any given point in time.

 

Service Potential is defined in the IIMM as “the total future service capacity of an asset. It is normally determined by reference to the operating capacity and economic life of an asset”. In simple terms, the Service Potential expresses the available service level that the asset or asset component will provide.

 

Whilst Service State reflects where an asset or asset component is within its defined useful life at any given point in time, the corresponding Service Potential reflects the remaining available service level. In the absence of historical and/or existing Service Potential performance data, generally to begin with and when configuring the degradation profile, ‘Service Potential %’ is aligned to reflect the ‘Remaining Life %’ and hence the values are the same.

 

Native Scale offers organizations the ability to measure the Service State values using a scale that is ‘native’ to the organization. For example, ASTM D 6433-03 (commonly used in North America) defines the pavement condition index (PCI) as a numerical rating between 0 to 100 where 0 is the worst possible condition and 100 as the best possible condition.

Default Degradation Profiles

Brightly Predictor contains 13 preconfigured default degradation profiles, designed to be used in a number of typical scenarios. The default profiles cannot be edited or deleted. The 13 default profiles are:

 

Generic Life Cycle Profile	This is the default degradation profile. It has a linear relationship between Service State and Remaining Life/Service Potential.
Assetic Lifecycle Profile A	A Concave Steep Profile applicable to assets with short to medium useful lives such as plant and mechanical items subjected to constant wear and tear and higher utilization and/or aggressive environments. This lifecycle degradation profile reflects the situation of an asset that is subjected to a moderate rate of consumption progression during the initial phase of its life and the rate of consumption gradually decreases as the asset is consumed.
Assetic Lifecycle Profile B	A Concave Moderate Profile applicable to assets with short to medium useful lives such as plant and mechanical items subject to constant wear and tear. This lifecycle degradation profile reflects the situation of an asset that is subjected to a moderate rate of consumption progression during the initial phase of its life and the rate of consumption gradually decreases as the asset is consumed.
Assetic Lifecycle Profile C	A Half-Parabolic Profile applicable to assets with short useful lives such as furniture and fittings subjected to normalized wear and tear. This lifecycle degradation profile reflects the situation of an asset that has a moderate rate of consumption progression initially and the rate of asset consumption decreases as the asset is consumed.
Assetic Lifecycle Profile D	A Linear Steep Profile applicable to assets with short to medium useful lives such as seals, protective coatings, which are subjected to higher utilization or aggressive environments. This lifecycle degradation profile reflects the situation of an asset that experiences a constant (but more accelerated) rate of consumption throughout its life, as compared to a straight line degradation profile.
Assetic Lifecycle Profile E	A Straight Line Profile applicable to assets with short to medium useful lives such as seals, protective coatings. This lifecycle degradation profile reflects the situation of an asset that experiences a constant rate of consumption throughout its life, often related to the asset's age rather than usage or utilization.
Assetic Lifecycle Profile F	A Linear Gradual Profile applicable to assets with short to medium useful lives such as electrical or mechanical items, and not subject to constant wear and tear. This lifecycle degradation profile reflects the situation of an asset that experiences a constant (but slower) rate of consumption throughout its life, as compared to a straight line degradation profile.
Assetic Lifecycle Profile G	A Crescent Profile applicable to assets with short to medium useful lives such as road surfaces, fixtures, which are subjected to higher utilization or aggressive environments. This lifecycle degradation profile reflects the situation of an asset that has a constant rate of consumption for the most part of its life, and the rate of consumption increases as the asset is consumed.
Assetic Lifecycle Profile H	A Invert Half-Bath Profile applicable to assets with short to medium useful lives such as road surfaces, fixtures. This lifecycle degradation profile reflects the situation of an asset that has a constant rate of consumption for the most part of its life, and the rate of consumption increases as the asset is consumed.
Assetic Lifecycle Profile I	A Reverse S Type 1 Profile applicable to assets with medium useful lives such as pathways, kerbs, structures, pipes, which are subjected to higher utilization and/or aggressive environments. This lifecycle degradation profile reflects the situation of an asset that has a moderate rate of consumption progression and after the midpoint of its lifecycle, the rate of asset consumption increases.
Assetic Lifecycle Profile J	A Reverse S Type 2 Profile applicable to assets with medium useful lives such as pathways, kerbs, structures, pipes. This lifecycle degradation profile reflects the situation of an asset that has a moderate rate of consumption progression and after the midpoint of its lifecycle, the rate of asset consumption increases.
Assetic Lifecycle Profile K	A Convex Moderate Profile applicable to assets with long useful lives such as pavements, structures, facilities, pipes, which are subjected to higher utilization and/or aggressive environments. This lifecycle degradation profile reflects the situation of an asset that has a slow to moderate rate of consumption for a large portion of its life, and as the asset is consumed, the rate of asset consumption increases.
Assetic Lifecycle Profile L	A Reverse Hyperbolic Profile applicable to assets with long useful lives such as pavements, structures, facilities, pipes. This lifecycle degradation profile reflects the situation of an asset that has a slow rate of consumption for a large portion of its life, however as the asset is consumed, the rate of asset consumption increases.