International Journal of Modern Management Sciences
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Table of Content for Vol. 7 No. 1, 2018

Causes of Variation Orders and Their Effect on Building Construction Projects
Akomolafe Mariam Abidemi., Ademola Sakariyau. A. and Atoyebi Akeem. A.
      
 PP. 1 - 12
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ABSTRACT: Variation order has been one of the serious issue that building construction industry has been battling with, the aim of this research are to identify factors that are responsible for this menace and to examine its effects on building construction project in southwestern Nigeria. Questionnaire method was used to extensively obtain the view of people, construction projects consultants, employers, contractor, tiller, carpenter, plumber, Iron bender, were consulted. The study was able to isolate more than seven causes of changes in order out of as many as 26 causes. Cost and time factor constituted the most visible consequences of variation orders in construction projects. These findings seem to agree with the view of experienced specialists. However, this research is restricted to building construction project, construction management problems is common within the developing countries, change of plans or scope by employer, error and omission in design, differing site conditions and contractor’s financial difficulties were some of the critical factors causing variation order in building construction projects. Safety performance index, non-safety performance index and spearman rank correlation coefficient were used to carry out the analysis, generally, these result shows a low correlation between owner and the contractor while that of the employer and contractor is as high as 97%. It was observed that change of plans or scope by employer, error and omissions in design and owners’ financial problems were the critical factors that cause the existence variation orders in building construction projects We hope that this work will give a sensitive clue towards reducing [if not totally eradicating] variation order by the owner, planner and executors of building construction projects in Nigeria.