Final answer:
A Network diagram is a schematic display of the logical relationships and sequencing of project activities, distinguishing itself from other tools such as the Gantt chart, critical path, and Work Breakdown Structure (WBS).
Step-by-step explanation:
A schematic display of the logical relationships among project activities and their sequencing is known as a Network diagram. It graphically represents the various project activities and the sequence in which they are to be completed. Unlike a Gantt chart, which represents project activities along a timeline, a Network diagram illustrates the dependencies between various activities. This is critical for determining the critical path, which is the longest sequence of activities that must be completed on time for the entire project to be completed by the due date. A Network diagram does not provide as detailed information on the timing as a Gantt chart, nor does it break down the project into smaller components like the Work Breakdown Structure (WBS). However, it is an indispensable tool for understanding the workflow and identifying potential bottlenecks.