________ are timeless events that show progress in the project. These are typically achieved at the end of phase in the project lifecycle.

Achievements is not a formal project management term and does not describe the specific concept of zero-duration schedule events used to mark phase completion.

A milestone is a significant point or event in a project schedule representing completion of a major deliverable or phase - it has zero duration, meaning it marks a specific moment in time rather than a period of active work. Milestones are used to signal progress to stakeholders and are traditionally placed at the end of each project lifecycle phase, serving as checkpoints for management review and go/no-go decisions. Note: the question contains a typographical error - 'Millstones' should read 'Milestones.'

Phases are defined periods of time within the project lifecycle during which specific sets of work are performed - they represent durations of effort, not timeless point-in-time events.

Templates are pre-formatted documents or frameworks used to standardize project artifacts and have no relationship to tracking progress or marking events on a project timeline.