Now here are the steps:

• Draw the outer walls of the bowl.
• Draw the inner walls if you need them; they're not required. You do need, however, to decide how thick the walls should be; .5" in our case.
• Draw horizontal lines to mark the layer boundaries, in this case .75" spacing.
• Measure off the diameter of the bowl at each layer boundary, including the bottom, 3, 4.33, 4.9, etc.
• Transfer these measurements into the Segmented Project Planner.
• Exercise the AutoBowl function with the wall thickness set to .5.