A Contingency Cost Estimation System for Road Maintenance Contracts

Editors

P. Tang, O. Chong, D. Grau, K. Parrish, J Chang (Eds.)

Document Type

Conference Proceeding

Publication Date

1-1-2016

Publication Title

Procedia Engineering

Publisher

Elsevier Ltd

Volume

145

First page number:

128

Last page number:

135

Abstract

Generally, a contingency cost is provided in a project to cover the change orders (CO) that may be generated in a project during the construction phase due to various reasons, such as unforeseen conditions, design errors, and scope changes. If the contingency cost could be accurately estimated during the contract's procurement phase, the CO cost could be properly managed during the construction phase. Traditionally, contingency costs are allocated around 10% to 15% of the project cost without considering any of the historical CO costs. In this study, a tool was developed to estimate the contingency cost of a road maintenance contract by using a mathematical model. The tool forecasts the contingency costs for each of the road maintenance activities included in the contract by using an artificial neural network model based on the historical CO data. The tool was validated using the CO cost data available from road maintenance contracts. © 2016 The Authors.

Keywords

Artificial Neural Network; Change-Order; Contingency Cost; Road Maintenance Contracts; Unforeseen conditions

Language

English

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