A PM wants to add a chart to the monthly status report to show major...

A milestone chart is the best chart to use to show major accomplishments for key events, because it displays the important deliverables or outcomes of a project along a timeline12. A milestone chart can provide a high-level overview of the project progress and achievements, without showing the details of each task or activity34. A milestone chart can also help communicate the project status and expectations to the stakeholders, and identify any potential risks or delays that may affect the project completion56. References = CompTIA Project+ Certification Study Guide7, CompTIA Project+ Certification Exam Objectives8, What is a Milestone Chart?1, How to Create a Milestone Chart in Excel in 3 Steps2, Milestone Chart: The Easiest Way to Track Project Milestones3, How to Use Milestones in Project Management4