The planning department is essential in the controlling, monitoring,evaluating, scheduling, and budgetin of the projects whose functions are summarized into the following:  First: the planning department derives the cost estimates of all projects, making quantity surveying, and prepares the B.O.Q., and assigns the weight percentage for each activities.   Second: the planning department prepares the schedule, the projected targets and the preparations of the invoices.  Third: the planning department monitors the progress of the work,recommends the changes and finalizes the corrections.