He worked with government agencies, and national and international organizations, and was a frequent lecturer on enterprise architecture planning.
[5] Spewak’s approach to Enterprise Architecture Planning is similar to that taken by DOE in that the business mission is the primary driver.
[5] His approach to Federal Enterprise Architecture has helped organizations with modeling, business strategy planning, process improvement, data warehousing, and various support systems designs, data administration standards, object-oriented and information engineering methodologies, and project management.
Since the publication of his seminal book, he and his partners introduced enhancements to the EAP methodology such as updates for technology architecture, expansion of implementation requirements, and methods for calculating planning project duration and effort.
Spewak authored and co-authored several books, papers and articles on enterprise architecture and related topics.