Swapping Gantt chart hierarchies with Field Parameters

With the new Field Parameters feature, you can now change the presentation of your visuals in a number of new ways. One way is to change the order of fields shown in a table or matrix, although the standard application of field parameters for this use case doesn't allow you to enforce a sort order. Here's an approach that allows you to retain your sort order, with an application for creating a Gantt chart of different hierarchies with overlapping members.