Abstract
AbstractThe paper presents the evaluation of cost-time performance analysis of small scale automotive maintenance firms in Calabar metropolis. The objective of the study is to ascertain the impacts of cost-time variation on the productivity performance of SMS auto maintenance firms. Primary data from seventy different auto-maintenance projects executed by Automobile, Heavy duty, Generator and Panel beater auto firms between February to October 2016 were sampled using direct observation. Analyses of data was performed using Microsoft Excel 2013 and Eviews 9.7 software. Descriptive results revealed poor cost estimation, maintenance duration, labour cost increase, maintenance type, industry size and poor scheduling which ranged between 69.31 ≥ 64.31 ≥ 63.75 ≥ 61.67 ≥ 60.97 ≥ 59.31 respectively as major factors causing cost-time overrun in SMS auto maintenance firms. Average cost and time overrun were specified at 82.8 and 62.8%, thus resulting in a cumulative cost-time performance factor of 6.4, 41.3 and 93....
Highlights
Maintenance practice can be described as the overhaul of industrial equipment or machinery (Licker, 2003)
Regression models formulated include (i) Model I and II–Cost and Time overrun with maintenance type, industry size, and estimated cost (iii) Model III–Actual performance factor with cost overrun rate, and time overrun rate
The study recommends that scheduling and proper cost estimation during negotiation stage should be considered critically, to avoid unnecessary variation in cost and time at maintenance completion
Summary
Maintenance practice can be described as the overhaul of industrial equipment or machinery (Licker, 2003). In developing nations like Nigeria, large number of automotive maintenance firms are classified as “small scale” or informal sector. Corrective maintenance activities are, in contrast to preventive maintenance, not schedulable (Blischke & Prabhakar Murthy, 2003) This makes them harder to plan and more costly to perform. Hardly are these activities or maintenance by auto mechanics completed without overrun, thereby stimulates negative effects such as time delay, increased costs, productivity loss and many litigations between operators and auto mechanics, posing a major setback and lack of confidence to the industry at large. Because each party tends to incur additional costs and lose potential revenues when there is any variation at project completion
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