Gantt chart use cases
The same project timeline reads differently depending on who is looking at it. A client needs the decisions and the delivery dates. Your own team needs the current plan against what was agreed, and what changed. Pick the use case closest to what you're building.
Client presentations
Build the view around the client decision -- phases, handoffs, and dates -- then export a clean, fixed image for a proposal, kickoff, or steering deck.
Project status reporting
Combine planned dates, baseline variance, and manually recorded progress in one view, so a status update shows what moved and what happens next.