If you’d like to show the relative week number from the project start next to milestone tasks in the WBS of the Gantt chart. You need to insert a calculated text field with to handle this.
Right click on the column header
- Select “Insert Column.”
- Select an unused custom text field name like “Text1″.
- Change the title to something like “Week #”.
Now, you should see a blank column with the header “Week #” on it.
- Right click that new column header and choose “Customize Fields…”
- Click the “Formula…” button
- Type the following formula into the formula dialog:
- CStr(1+DateDiff(”w”;[Project Start];[Start]))
ASE