Abstract

This study explores the arrivals of water pipeline break failures. The aim is to assist the facility manager in the decision making process. Based on characteristics of the data set ranging from 2011 to 2014, two steps of analysis were presented in the paper. This first step is the analysis of partially complete data set (2011 data). The 2-sample KS test is adopted to check the similarity between this data set and the entire data set with no underlying distribution implied. In order to conduct the reliability analysis, the Weibull distribution is adopted to evaluate the data. For annual data set, the 2-parameter Weibull distribution fits data sets pretty well. The shape parameters are a little greater than 1, indicating a slightly increasing arrival rate of such failures. For the entire data set, the 3-parameter Weibull tends to fit the data better than the 2-parameter Weibull. The shape parameter is well above 1, indicating an increasing arrival rate of the failures. To eliminate the impact of missing points for the 2011 data set, data from 2012 to 2014 were also considered as a new set, the Weibull distribution generated a decent fitting. The shape parameter is a little greater than 1. Therefore, there is a slightly increasing arrival rate of those pipeline failures. Results from this study provide decision makers valuable information in terms of whether additional efforts shall be made to enhance the system’s performance in order to reduce the failure rate.

Highlights

  • The water pipeline plays an important role in the daily life of residents

  • This paper explores the arrival pattern of water pipeline breaks

  • The 2-sample KS test is adopted to verify the similarities between data sets without indicating any underlying distribution

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Summary

Introduction

The purpose of water pipelines is to transport surface water and/or ground water from one place to another. Failures of those pipes are inevitable in the facility management. Such burst pipes in the water system are one of the most common issues at a resident’s home as well as in the public system. The impacts of water pipeline failure can be very devastating to the surroundings. A failure on the water main at home creates damage to surrounding properties, leaves residents without water supply for days. A pipe burst on the main system may impact the entire area of a city and cause huge trouble for residents

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