1. Participants have different timings for when they would like to receive notifications or take surveys (e.g., different bedtimes, different wakeup times, different work schedules, etc.).
2. Participants may miss a survey but would like to move the survey to a different time slot and take it later.
3. Participants may miss a time slot but would still like to provide responses to the survey after it is closed.
4. You may wish for participants to start the project on a specific day of the week (e.g., Monday).