JavaScript must be enabled in order to use this site.Please enable JavaScript in your browser and refresh the page. A History of What-If Analyses The history of what-if analyses can be divided into two periods: "Before Haestad Methods - Distributed Scenarios" "With Haestad Methods: Self-Contained Scenarios" Before Haestad Methods - Distributed Scenarios With Haestad Methods: Self-Contained Scenarios Parent topic: Understanding Scenarios and Alternatives