Hello, I need to make a gantt chart in Excel that uses processors relationship (graph). I do not know the start date for each task, however processors should calculate if for me. I want to know the end date of this project or the duration of the project knowing the duration for each task. I attached file with what I started, but I suck with formula for series for tasks that have two processors. Also, if you can help with adding a critical path to it, it will be great.