This is called the critical path Use the network to help plan, schedule, monitor, and control the project. Thus these critical activities receive the prime attention and activities having Slack Time are fit in with a more comfortable appropriateness. With higher costs many activities can actually be completed more quickly. For various reasons that may become desirable or necessary as a Project moves toward completion. Straight forward in concept and not mathematically complex.
Graphical displays using networks help to perceive quickly relationships among project activities.
Critical path and slack time analysis help pinpoint activities that need to be closely watched. Networks generated provide valuable project documentation and graphically point out who is responsible for various activities Applicable to a wide variety of projects and industries. Useful in monitoring not only schedules, but costs as well. Project activities have to be clearly defined, independent, and stable in their relationships. Precedence relationships must be specified and networked together Time estimates tend to be subjective and are subject to fudging by managers who fear the dangers of being overly optimistic or not pessimistic enough.