@mkaess ,
That’s not going to be an easy visual to put together. There’s nothing I’m aware of that handles that out of the box. I think your best bet is going to be to create the bar chart and then create a custom Gantt chart with a fully transparent background and overlay the latter over the former.
In terms of the technique for creating the Gantt chart, @MehdiH just submitted an outstanding entry in Data Challenge 16 where he created almost exactly the type of Gantt/bar chart hybrid I think you will need for the upper overlay. Here’s a link to his report:
I hope this is helpful.
- Brian