Final answer:
A schematic display showing project tasks and their sequential relationship is known as a Gantt chart or a project timeline, widely used for project management and scheduling.
Step-by-step explanation:
A schematic display that illustrates the various tasks in a project, as well as their sequential relationship, is commonly referred to as a Gantt chart or a project timeline. Gantt charts are a type of bar chart that represents a project schedule and are used extensively in project management.
They display the start and finish dates of the terminal elements and summary elements of a project. A single Gantt chart can represent the tasks and timelines for any type of project, making it a versatile tool for visualizing project progress and facilitating planning and coordination among team members.
Additionally, Gantt charts help in understanding and following the sequential process of project tasks that need to be followed, much like a flowchart would do for the steps within a particular process.