Abstract
Various factors identified from the literature that caninfluence quality of building projects in Nigeria have beenstudied by means of questionnaire survey sent to architects,engineers and quantity surveyors in the industry. From atotal response of 107 consultants, the importance of eachfactor was obtained via severity and frequency responsesof the factors. Data analysis includes comparisons ofranking among consultants using severity, frequency andimportance indexes, correlation analysis, and percentagerank agreement factor (PRAF) to measure the agreement inthe importance ranking among the consultants.Correlation results between the professionals are architects/quantity surveyors (0.75), architects/engineers (0.21 ),and engineers/quantity surveyors (0.24). The percentagerank agreement factor (PRAF) shows that the five mostimportant factors affecting quality are 'design changes'(78.9%); 'inadequate involvement of other professionalsduring the design stage' (78.9%); 'insufficient andunrealistic constraints of project cost' (71.1 %); 'poor levelof commitment to quality improvement among designprofessionals' (63.2%); and 'making design decisions oncost and not value of work' (55.3%). The results of this studywould provide feedback for the clients, project and qualitymangers and all the consultants in the industry, so thateffective management of quality can be ensured from theconceptual-design stage of the project.
Highlights
Quality and quality systems are topics which have been receiving increasing attention worldwide (Lowe and Seymour, 1990; Low, 1992; Waiter, 1992; Chan, 1996; Yates and Aniftos, 1997; Docker, 1991; Arditi and Gunaydin, 1997)
This paper reports the finding of a study which was undertaken to determine the design factors influencing quality of building projects in Nigeria from consultants' perspective
This research reports the findings of a study that was undertaken to determine the design factors influencing quality of building projects in Nigeria from consultants'
Summary
Quality and quality systems are topics which have been receiving increasing attention worldwide (Lowe and Seymour, 1990; Low, 1992; Waiter, 1992; Chan , 1996; Yates and Aniftos, 1997; Docker, 1991; Arditi and Gunaydin, 1997). The high cost of building makes it necessary to ensure quality of the finished product. In achieving this quality of the finished product effort must be taken to look at the construction process of the delivery product. The National Economic Development Office (NEDO, 1987) adjudged that some two thirds of inadequate qualities on construction sites were due to design inefficiencies. All these point to the fact that design process has great influence in achieving quality of building projects
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