Veronica, There are several providers of LMS decision tree models, mainly from software providers, that can be located through a basic search. As a starting place, I suggest you go to the following web address for an article that contains a decision tree for selecting an e-learning strategy. http://www.learningsolutionsmag.com/articles/103/decision-trees-for-selecting-an-e-learning-strategy--a-case-study. Dr. Robert Roehrich