Use Predecessors for a Shared Start Date and Extended End Date


I am working on a marketing project plan template, and some of our campaigns spend multiple days in market. Tracking the performance of these projects happens for the duration of the project plus the duration of an attribution window.

Example: An email campaign launches on 4/1 and runs through 4/7, and any email leads generated 4/1 through 4/21 are counted towards the email campaign (7-day campaign + 14-day tracking window).

If I have a row for "In-Market Date" and a row for "Collect Performance Data", is it possible to use predecessors to sync this activity? So that they always share the same start date, but 'collect performance' always ends two weeks after 'in-market date'?