Abstract:
The study company is in electrical contractor business which is mainly working in
electrical installation, bidding, cost estimation before bidding is very important to success in the
business. From the record between January to December 2008, shown that the inaccurate
Estimation of company in bidding is lead to over budget in the project to customer in 5 from 10
project that were performed and cause in reduction profit of company about 89,938 baht per
Project, so the profit of company is company is mainly depend on how accurate of estimator in
each project, the people who response on the working area need to be performed.
To prevent the inaccurate estimation, the improvement of project estimation system is
Given to this case and found that the difference of an old style estimation and new system is
8.88% and 2.65% or 89,938 baht and 37,615 baht comparing to real project cost, this can prove
that by performing new estimation improvement, the difference between real cost and estimation
cost of each project is reducing 70.15% for each project, comparing to target at 50% reducing this
is make more profit to company.