Productivity Analysis of Closed Circuit Television (CCTV) Sewer Mainline Inspection

This thesis focuses on conducting productivity analysis for sewer mainline CCTV inspection through two phases: 1) developing the standard time for CCTV inspection and analyzing the effect of the weather condition and ambient temperature on its productivity, and 2) reviewing the CCTV process through a time study, with the aim of minimizing the CCTV cycle time and productivity improvement. Since traveling and locating manholes in the CCTV inspection process were defined as the most time consuming tasks, the traveling salesman problem (TSP) optimization method was used to optimize the CCTV trucks driving patterns. The influence of route optimization application in the CCTV process was analyzed in both daily activity and project planning stages.