Network planning and analysis (CPM) is a proven means to outline the many activities to be performed and to investigate the feasibility of a given construction project. Commencing with a Master Project Schedule, developed in a low level of detail, the criteria is set for engineering and document development together with the logistics of construction. Costs, determined by conceptual estimates, added at this time forecast financial requirements. Schedule development continues to expand in detail as engineering information proliferates, and alternative construction methods and procedures are studied. With contractor input, a detailed Procurement and Construction Schedule is generated. Ultimate success of the project depends upon careful implementation and surveillance of the plan and schedule. Regular monitoring and comparing of actual performance with the plan and schedule enables maintenance of effective time and cost control.