Who can use this feature
All Project users can convert a Task to a Milestone.
Task Owners, Assignees and Admins can edit the Milestone Target Date.
Milestones mark critical points in your project, from contract deliverables to site handovers. In Aphex, they work just like Tasks, so you can assign all the same details: like Owners, Resources, Subcontractors, Blockers, Work Areas, and Delays.
Milestones can include a fixed Target Date, giving you a reference point to track progress against. The Gantt will summarise & highlight whether you're on track or slipping, across all your Milestones.
To create a Milestone, convert any existing Task or Subtask, or import Milestones directly from your Master Schedule.
Create a Milestone from the Gantt:
Hover over the task name
Click and select Convert to Milestone
Each Milestone can be assigned a Target Date: the original or ideal date you’re aiming for, often pulled from a Master or Contract Schedule. The Target Date marker changes colour based on performance, helping you see at a glance how things are progressing against the plan.
Right click a Milestone and select View Details
In the Task Panel that opens, locate the Target Date section
Toggle Set Target Date
If your Milestone has slipped the Target Date marker will appear as
If your Milestone is on track, Target Date marker will appear as
Use the +/- indicators to see how many days a Milestone is ahead or behind
Use the Milestone Panel to compare current Milestone Dates to Target Dates, or pervious Weekly Versions to see how things have shifted over time - and spot the impact of today's changes on future Milestones, even if they're outside of your View.
On the Gantt, select the Milestone Icon in the right-hand panel
This opens the Milestone Panel, showing Milestones across the Project
Click the ⌄ next to any Milestone to expand its history and see how it’s changed over time
In the Milestones Panel, click into the Compare To dropdown
Select Target Date
Instantly see how many days ahead/behind for each Milestone, compared to their Target Dates
In the Milestones Panel, click into the Compare To dropdown
Select Previously Published Version
Instantly view the variance between current and baseline dates
See also:
Turn on the Critical Path Overlay to highlight the short term path to any Milestone. The critical path will light up in gold, and everything else fades to blue - so it's easy to see what's critical and what's not. You can view paths for all Milestones or focus on one at a time.
To turn on the Critical Path
Open the Gantt and click
Select Critical Path to highlight all Milestone paths in gold
Or click the > to choose specific Milestone pathways to highlight individually
Click and
Select Milestone in the first dropdown
Select from Is True or Is False in the second dropdown
Your Project comes with a pre-made Upcoming Milestones View.
Click + Views within the open View Tabs
Select Upcoming Milestones View
See also: creating & sharing
Pick the date
Open the config menu to toggle filters for delayed or improved Milestones
Each Milestone spans at least one day, just like every Task in your plan.
Only Tasks and Subtasks can be converted to Milestones
When converted, the Milestone keeps all its original Task properties, including duration, delay history, owner, and assigned resources
Attempting to set the Duration to 0 will also trigger the Convert to Milestone flow
You can convert a Milestone back into a Task or Subtask at any time
Target Dates will show green if:
The Milestone End Date matches the Target Date
The Milestone End Date is before the Target Date
Target Dates will show red if:
The Milestone End Date is after the Target Date
On the Gantt, a Variance Number will show how many days the Milestone has slipped or improved by
Target Date Icons & Variance update in real time as changes are made to the plan
Date Range: Controls which Milestones appear in the list. You can show only those within your current Gantt view, all future Milestones, or every Milestone in the project. Group By: Organises your Milestones into sections. Choosing Performance vs Target splits them into four groups based on how the Milestone's end date compares to its Target Date:
Approaching Target: the end date is before the Target Date
On Target: the end date matches the Target Date exactly
Behind Target: the end date has passed the Target Date
No Target: no Target Date has been set
You can also group by Owner, Subcontractor, Folder, or Package. Sort By: Controls the order Milestones appear within each group. Sort by date or variance, in ascending or descending order. Spotlight Milestones with Variance: When toggled on, this highlights Milestones that have slipped or improved. You can choose to spotlight just slippage, just improvements, or both. Your configuration is saved automatically per user, so the panel will remember your preferences next time.
Multi-Select