I'd head to Gerard Kleywegt's "Practical Model Validation" web course post-haste: http://xray.bmc.uu.se/embo2001/modval/ <http://xray.bmc.uu.se/embo2001/modval/>Eric On Mon, Jan 18, 2010 at 11:00 AM, james09 pruza <[log in to unmask]>wrote: > Dear all, > > What are the standard methods for the crystallographic model judgment? What > parameters should be included in the final refinement statistics in relation > to the model error? What is Cruinkshank DPI and how can it be calculated and > what information it gives about the quality of the model? > > Thanks in advance for the suggestions. > > J. >