Life Cycle Planning - Prioritisation Methods

BridgeStation Knowledge Base > BridgeStation Web Edition > Modules > Life Cycle Planning
The Life cycle planning module offers two prioritisation methods to prioritise maintenance works for budget and/or bci constraints-based analysis. 
  1. Structures Toolkit/SAVI Prioritisation Method: As documented/used in the structures toolkit/SAVI, this prioritisation method ranks each structure based on its usage (Carried/Crossed/Traffic etc) combined with elements priority score. 
  2. Risk-based prioritisation Method: Developed by LOBEG and TfL, this method ranks structures based on the overall risk associated with structure by quantifying the likelihood of failure and resulting consequences. 
Details of each prioritisation method are described below. 

1. Structures Toolkit/SAVI Prioritisation Method:

Below is a quick overview of the Structures toolkit prioritisation method. Source:  SAMPt_Part_A_Methodology_v201.pdf

Please refer to section 11 of SAMPt_Part_C_Supporting_Info_v201.pdf for details.

Please note that, as described in the SAVI toolkit, extra priority (higher weightage) is considered for high and very high-priority elements which are poor (ECS 4) or very poor (ECS 5) conditions.

2. Risk-Based Prioritisation Method

The annual risk (risk-based priority) of a structure is evaluated based on the consequences of a failure event and the likelihood of this event occurring.

Priority Score = ( (Tf x Length)  +  OBSf)  x  Lf  x  AFPMT  x  AVf

Where: 
Tf      
 = 
Traffic Factor            
Length 
 =  
Structure Length (m) 
OBSf
 =   
Factor-based on Obstacle Crossed / Route Adjacent to the Foot of the Wall/Earthworks. 
Factors are derived from SAMPt Part C Supporting Info Table C.11.C
AVf 
 =   
Asset valuation factor 
Lf   
 =   
Likelihood of Failure Factor 
AFPMT 
 =   
Adjustment factor due to primary material type 

For Lf and AFPMT scores, please refer to  Risk Based Prioritisation Good Practice Guide (Section 7.2)

The traffic factor (Tf) is defined below.















Article ID: 318, , Modified: 11/1/2022 at 10:50 AM

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