Display slipped milestones

Question:

How can I show that a deliverable, or any milestone, has slipped?

Answer:

There is not a set method of displaying a slipped date. However, if the goal is to display a start symbol, a connector, a planned end symbol, along with a slipped end symbol, then this could work:

Use a legend to identify the meaning of each symbol:

Baseline and actual dates are also a method of displaying how what was originally planned is not what occurred.