In project management, which tool is primarily used to illustrate activity sequences?

The primary tool used to illustrate activity sequences in project management is network diagrams. Network diagrams visually represent the relationships and dependencies between various activities in a project. They show the sequence in which tasks must be completed and help project managers identify the critical path, which is the longest sequence of dependent activities that determine the project's duration. By mapping out the activities and their interdependencies, network diagrams enable project managers to analyze timelines, allocate resources efficiently, and understand how delays in one task may affect the entire project schedule.

Other tools listed serve different purposes. Gantt charts are useful for tracking project timelines and milestones, showing the duration of activities, but they don’t specifically focus on the sequence of tasks. Fishbone diagrams are used for root cause analysis, and SWOT analysis assesses strengths, weaknesses, opportunities, and threats, which are not directly related to illustrating activity sequences.