The main task of contractors' estimators is to predict the likely costs involved in executing a future project. This is an onerous job as any errors made can undermine project success and ultimately reduce the contractors' profit margins. The inherent uncertainty of most construction work,...

Cost estimators play an important role in an organization, as they produce most predictions of probable final construction cost. Since both under- and overestimates can be costly, attention should be paid to the estimating tasks. People involved are therefore likely to experience a considerable...