Which date field to use to populate Gantt chart?
My team is transitioning to use Gantt charts to visualize our project timelines. There are a few visualizations that we'd like but I'm unsure on which date field should I use to populate the Gantt chart.
1. Launch date (a vertical line that goes straight down the calendar indicating when the project is going live)
2. Start date - project (a date that will determine the start day of all tasks in the project)
3. Start day - tasks (start date for tasks will be determined by this start day and start date of project. For e.g. if start date for project is 1st Jan and start day for task is 1, then the start date for task should be 2nd Jan).
4. End date - tasks (how long does it take to complete a task - 1 day, 5 days, etc)
I understand this might be a complicated question so any help would be greatly appreciated!