The M&V Workgroup created this Selection Guide in June 2019 to discuss some of the modeling alternatives to traditional multivariate linear regression forecast models. A method selection decision tree provides guidance to determine the appropriate M&V method under common circumstances. Detail on the application, merits, demerits, and special considerations for each of seven methods is then provided. The appendices include references, standard metrics for model fitness (statistical verification), and discussion of some common analytical choices.