What is the primary purpose of a Gantt chart in project management?

The primary purpose of a Gantt chart in project management is to compare project timelines against a baseline. Gantt charts are visual tools that display project schedules, including the start and end dates of tasks as well as their dependencies. By representing tasks along a timeline, project managers can easily determine if the project is on track, ahead of schedule, or behind schedule compared to the planned baseline. This functionality is crucial for monitoring progress and making informed adjustments to resources or timelines as necessary.

The other options represent important aspects of project management but do not define the primary function of a Gantt chart. Identifying resource allocations is related to resource management, establishing project success criteria pertains to evaluating project performance, and outlining project requirements deals more with scope definition. While these elements might coexist in a project plan, the Gantt chart specifically excels in visualizing and tracking the progression of project timelines relative to predefined schedules.