Osmium CRM enables to work efficiently, by breaking down your projects into Milestones & Tasks.
Project Milestones are points along the progress path of your project. Milestones do not have target dates, but rather they focus on specific progress points that must be achieved for a project to be successful.
As the administrator, you can control how project milestones are used inside the dashboard. You do this via the dashboard settings panel
When a milestone is deleted, there is an option to delete all its tasks, or the tasks will automatically be moved into the uncategorized milestone.