Abstract:
With the continuous decline in profit margins and increased competition in construction
projects, construction contractors are finding ways of eliminating waste and increasing profit. Although
numerous approaches have been developed to improve efficiency and effectiveness of construction
processes, implementing statistical techniques offer the promise to minimize, if not eliminate non valueadding
work.
Time study is the study carried out to assess human effectiveness by improved planning and sound
incentive scheme to its employees. It is employed in the assessment of human efforts in all its aspects to
lead systematically to all the factors which ultimately affect efficiency and economy of the situation under
study in realizing the objectives of bringing about improvements.
The purpose of this article is to highlight the benefits of statistical techniques over the traditional
methods employed in construction. The writer intends to explain, why time-motion studies need to be
carried out to determine the productivity of the system under study; why waiting line models need to be
applied to find out the most optimum solution or method which will give highest productivity. Further, the
authors stress that vendors must be rated based on their past performance for punctuality, quality and
reliability, and hence a Vendor Rating Index(V.R.I) should be given to vendors, which would help assessing
them for present or future assignments. Vogel’s Approximation Method must be applied to a Transportation
Matrix for finding Initial Basic Feasible Solution (IBFS).Subsequently method of multiplexes must be
applied to the Transportation Matrix to balance between supply and demand and hence find out the optimal
units that need to be supplied from a particular site to a particular destination, minimum cost of
transportation is obtained.
