It is commonly known that accidents have serious impacts on the construction industry both in financial
and humanitarian terms (Dorji and Bonaventura H.W., 2006) such as “wasting cost”, “reducing
productivity”, “decreasing renown of company”, and “establishing negative psychological impact on
workers” (Mohamed, 1999; Tam et al., 2004).Yi and Langford (2006) declared that hazardous situations
cause wasted time and increased the cost of projects. However, excessive or unnecessary safety measures
may also result in both delays in schedule and in additional costs (Yi and Langford, 2006).Thus, the
managers, as key project members, should assess the most hazardous and risky conditions in order to
mitigate accidents, optimize cost and time, and promote quality of production.