A STUDY ON THE EFFECTS OF DESIGN CHANGES ON THE CONTROL OF CONSTRUCTION PROJECTS IN KENYA; CASE STUDY OF NAIROBI COUNTY.

ABSTRACT
In building projects, Client requirements, Constructive aspects and Quality standards are
defined during the design phase. However, this critical phase is usually carried out with
little interaction between the construction and design teams. This has resulted in changes
to the initial design causing many problems during construction such us: incomplete
designs, change orders, rework, construction delays, etc. However, few empirical studies
have measured this Impact in the Kenyan construction industry.
This research discusses the effects of design changes on the control of construction
projects in Kenya, a case study projects in Nairobi County. The focus is on the causes of
design changes, the effects of design changes on the control of construction projects and
the control procedures adopted to mitigate these effects.
This study comprise: Extensive review of literature of the subject of design changes in,
data collection from several projects in Nairobi County, analysis of the findings,
conclusion and recommendations from the findings.
A review of the most frequent causes, effects on control and control methods used in
construction projects allowed the researcher to collect data using Questionnaires from
488 projects approved by NCC (department of development control) for development in
Nairobi County from January 2011 to December 2012.
After analysis of the data, the study found out that design changes have several effects on
construction projects. Their causes and ways used to mitigate the effects are also
discussed.
Recommendations have been given at the end of the study on the various ways design
changes can be handled in the construction industry in Kenya.

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