The data needed for this research was collected by questionnaire that was developed
based on thorough review of the related literature (Assaf et al., 1999, 2001; Chan and
Pasquire, 2002; Eksteen and Rosenberg, 2002) and interview with local experts to reflect the
existing level of overhead or indirect costs and how the contractors deal with this subject.
The questionnaire comprised of two parts: the first part sought to collect the perception and
opinions as well as general information about the overhead costs, while the second part was
used to obtain data about the companies/contractors considerations regarding the
overhead under their works such as the value of the overhead costs as a percentage of the
total project cost, the controlling and management system if applied by the company, the
main considered components, among others. The questionnaire includes 22 main