"Process Improvement Services: EssUp". Ivar Jacobson. Archived from the original on 2008-03-31. We have learnt in the many years we have been helping organisations, that few people ever read process material whether it is in a book or on a website. https://web.archive.org/web/20080331082508/http://www.ivarjacobson.com/products/essup.cfm