@Julioamodia89 I looked over the parts you previously mentioned. You are aware that one of the most heavy processes in our context is the simulation of radiance, not always is our model simple, and the simulation is fast, One of the things we can do before the final result/optimization (which may take a few days) is reduce the radiance parameters and see a fast and rough result. So, as in the document mentioned, the check scene is just for a quick check of the results and materials.
this is the difference simulation time for one scene
and these are the result
So if you are working in the early stages, you can use CheckScence, but if you need a reliable result for a parametric study which its alternatives are too close in result. use PIT component