Nowadays, the performance of the construction industry has a major influence towards on the economic, infrastructure, agricultural and technological development of a country (R. Chudley, 1995). Construction is increasingly becoming highly technical and sophisticated with high standard of quality and specification. These coupled with clients demand for value-for-money requires the efficient employment of equipment which can largely improve the productivity in the construction industry.
The main aim of every construction project is to produce a structure or a building that can provide the required functions at the most reasonable cost, within a given time frame and at the required level of quality.