Asset replacement: a risk and criticality approach

2009 ◽  
Author(s):  
U. Bryan
Keyword(s):  
Asset Replacement

Selecting Sanitation Solutions for Peri-urban Areas: A Case Study of Can Tho, Vietnam

2010 ◽  
Vol 5 (4) ◽  
Author(s):  
Naomi Carrard ◽  
Juliet Willetts ◽  
Cynthia Mitchell ◽  
Mick Paddon ◽  
Monique Retamal
Keyword(s):  
Urban Areas ◽  
Cost Effective ◽  
Asset Replacement ◽  
Fit For Purpose ◽  
Infrastructure Investments ◽  
Sanitation Systems ◽  
Can Tho City ◽  
Sustainable Futures ◽  
Sanitation Infrastructure ◽  
Selection Of

In peri-urban areas where infrastructure investments have not yet been made, there is a need to determine the most context-appropriate, fit for purpose and sustainable sanitation solutions. Decision makers must identify the optimal system scale (on the spectrum from centralized to community to cluster scale) and assess the long-term costs and socio-economic/environmental impacts associated with different options. Addressing both cost-effectiveness and sustainability are essential to ensure that institutions and communities are able to continue to bear the costs and management burden of infrastructure operation, maintenance and asset replacement. This paper describes an approach to sanitation planning currently being undertaken as a research study in Can Tho City in southern Vietnam, by the Institute for Sustainable Futures and Can Tho University in collaboration with Can Tho Water Supply and Sewerage Company. The aim of the study is to facilitate selection of the most context-appropriate, fit for purpose, cost effective and sustainable sanitation infrastructure solution. As such, the study compares a range of sanitation alternatives including centralized, decentralized (at household or cluster scale) and resource recovery options. This paper provides an overview of the study and considers aspects of the Can Tho and Vietnamese regulatory, development and institutional context that present drivers and challenges for comparison of options and selection of fit for purpose sanitation systems.

PLANNING AND FUNDING ASSET REPLACEMENT: ONE AGENCY'S EXPERIENCE

2000 ◽  
Vol 2000 (9) ◽  
pp. 915-924
Author(s):  
V. Kenneth Harlow ◽  
Andrew V. Czorny
Keyword(s):  
Asset Replacement

Annual maintenance budget estimation for a plant system

2014 ◽  
Vol 20 (2) ◽  
pp. 193-210 ◽  
Author(s):  
Piyush Gupta ◽  
Shashank Gupta ◽  
O.P. Gandhi
Keyword(s):  
Design Methodology ◽  
Structural Approach ◽  
Maintenance Costs ◽  
Content Type ◽  
Plant System ◽  
General Rules ◽  
Plant Maintenance ◽  
Rules Of Thumb ◽  
Asset Replacement ◽  
Practical Implications

Purpose – The purpose of this paper is to propose a methodology to evaluate the annual maintenance budget (AMB) for a plant system as a percentage of its asset replacement value (ARV). Design/methodology/approach – Variables influencing the budget for the plant system are identified and modeled in terms of a plant maintenance Budget digraph. The nodes in the digraph represent the function of budget influencing variables and edges represent the degree of influence among these. The plant maintenance budget function is derived from the equivalent matrix of the plant maintenance budget digraph and is used to evaluate the AMB for the plant system as a percentage of its ARV. The presented model is illustrated with an example. Findings – The proposed methodology enables the maintenance managers and practicing engineers to evaluate the AMB for maintenance tasks based on plant specific variables that can vary from one plant to another, without resorting to general rules-of-thumb method of budgeting or to expert judgment. Research limitations/implications – The methodology suggested does not claim to cover all aspects of budgeting and is confined to direct maintenance costs. Practical implications – A fair estimation of AMB for a plant system gives an appropriate direction to maintenance actions and ensures that the assets will be kept in healthy and reliable state. This is desirable because it will ensure that maintenance resources are appropriately benchmarked and the resources are utilized judiciously. This ensures maintenance effectiveness. Originality/value – The paper presents a structural approach to budgeting for maintenance tasks. This approach is valuable for plant managers, with ease in implementation.

Asset replacement for an urban railway using a modified two-cycle replacement model

2007 ◽  
Vol 58 (9) ◽  
pp. 1123-1137 ◽  
Author(s):  
P Scarf ◽  
R Dwight ◽  
A McCusker ◽  
A Chan
Keyword(s):  
Replacement Model ◽  
Asset Replacement

Optimal replacement age of a conventional cotton harvester system

2014 ◽  
Vol 74 (1) ◽  
pp. 2-16 ◽  
Author(s):  
Gregory Ibendahl ◽  
Matthew Farrell ◽  
Stan Spurlock ◽  
Jesse Tack
Keyword(s):  
New Technology ◽  
Optimal Time ◽  
Content Type ◽  
Cotton Industry ◽  
Optimal Replacement ◽  
Technological Advances ◽  
Asset Replacement ◽  
Multiple Assets ◽  
Field Efficiency ◽  
Improved Technology

Purpose – The cotton industry has seen many technological advances throughout history that have greatly decreased the number of labor hours required to produce a bale of cotton. The latest advancement is a harvesting system that replaces the harvester, boll buggy, and module builder with a single machine. This is an asset replacement decision where there are multiple assets being replaced but the old technology (the defender assets) may all have different remaining lives and optimal lifespans. The purpose of this paper is to find the optimal time to replace the multiple defender assets with a single challenger asset (the improved technology). The goal is to determine if the ages of the boll buggy and the module builder affect the replacement age of the conventional picker. Design/methodology/approach – The paper extends the Perrin model to allow for multiple defender assets. Findings – The paper finds that the supporting assets do sometimes affect the decision to replace a conventional cotton picker. If the supporting assets are newer, then the replacement decision may be delayed and if the supporting assets are older then the replacement decision may be accelerated. Field efficiency can affect the decision as well. Originality/value – While the Perrin model has been used extensively, the authors believe the application to a multiple asset defender is unique. Although this type of replacement decision is not common, there could be other applications as new technology is introduced on the farm.

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