If the intent is to edit a raw file first in DPP and then edit the same image in another program, then I think it is best to save a 16 bit TIFF from DPP for editing in the other program. It might be good to either export a linear TIFF if the gamma curve is to be chosen in the other program or to set the white balance in DPP and use the gamma controls in DPP to extend the dynamic range so that there is no clipping before saving the TIFF. Also, it might be good to disable auto lighting optimizer and peripheral illumination correction in DPP and do that in the other program because that seems to me best done after setting white balance and before unsharp mask. If using a Canon lens, then Digital Lens Optimizer might best be done in DPP, although rawtherapee capture sharpening also sometimes works very well.
