Halfway through a project, the sponsor states that the project is taking too long to...

The project manager should consult a Gantt chart after the sponsor states that the project is taking too long to complete. A Gantt chart is a graphical tool that shows the schedule of a project, including the start and end dates, durations, dependencies, milestones, and progress of each task or activity. A Gantt chart can help to monitor and control the project timeline and identify any delays, variances, or issues that may affect the project completion.