I recently visited Salto Systems in San Sebastian, Spain, and interviewed Marc Handles, one of the original founders of the company. I spoke with him in regard to access control system technology and its level of sophistication. I think you will find the discussions valuable in terms of a survey and in-depth analysis of capabilities and complexities of properly implementing access control hardware and software.
Salto Systems is one of the leading providers and developers of sophisticated multi-platform EAC systems in Europe and the United States. They utilize EVVA mechanical cylinders and technology in some of their products. Salto has systems in about forty countries with more than 650,000 installed locks.