Simulation is a proven approach which is able to give a significant impact to the level of effectiveness at construction sites. However, it is not used extensively due to the difficulty in developing a simulation model which reflects the real environment. Currently, the drastic expanding of technology has eased the development of the simulation model. This environment gives a huge implication to designer in continuously improving their level of competitiveness. Assume yourself to be the party responsible in giving advice to the general manager of your consultants firm in constructing a large scale project in Kota Indra Kayangan, Perlis. Items that need explanation the advantages and disadvantages of simulation model, development process of simulation modeling and explain one scope of work at the design stage that need to be simulated towards an effective implementation of the whole development project.