https://www.unodc.org/documents/org...cement/Criminal_Intelligence_for_Analysts.pdf
This one may be of use to Web Sleuth followers. It includes how to evaluate sources and data (information), analytical process, techniques -- link analysis, event charting, flow analysis, telephone analysis, and inference development.
If someone is interested in how to improve their abilities, this document may be of virtue to them. Obviously, it is not completely applicable to the discussions held on Web Sleuths, but some of it will be. And, if you deal with information in your day job, there are sections of the document that may be transferrable to various work roles.