Arabia has experienced a construction boom of unprecedented volume during the
past decade, attracting construction professionals from all over the world.
Construction industry was the greatest recipient of the government spending1. This growth was accompanied by an immigration of
people from rural to urban areas. The immigration movement, therefore, has
added to the already existing problem of housing shortages and inadequate
infrastructure. Saudi Arabia announced that more than 43,000 homes would be
built with an area of 66 million square meters2.
authorities in Saudi Arabia faces a serious problem of lengthy delays in
housing projects3. In construction, delay could be defined as the
time overrun or beyond the date that the parties agreed upon for delivery of
a project. However, the construction process is subjected to many variables
and unpredictable. One of the most important variables
is estimating the productivity4.
is defined as a ratio between an output value and an input labor/machinery
used to produce the output. In Saudi Arabia most of company or contractor’s
estimate the construction productivity based on American or global standard labor
rate. Moreover, the contractors relay on the use of standard method for
estimating productivity which is not accurate Because the Saudi industry is a
unique for many reasons such Saudi weather and labor culture that has to be
evaluated and considered. In construction industry labor cost 30 to 50% of
total cost of project5.
many factors affecting
productivity in reinforced concrete construction in Saudi Arabia, there is a
lack of research in terms of estimation tools for prediction of reinforced
concrete construction, especially at the rebar fixing.
In comparison with the other constituents of the reinforced concrete frame,
rebar fixing is one of the most labor-intensive and time-consuming activities
6. To address this gap, productivity assessment model
is needed. This model can then be used to measure project performance, which
in turn plays an important role in decision-making during the initial
planning stage and a tool for assisting field construction mangers
responsible for productivity.