The crossword solution for the term 'Alternative to Margie' is PEG, a three-letter word. PEG is an acronym for 'Program Evaluation and Review Technique', which is a project management tool used to analyze and plan projects. It is an alternative to the Critical Path Method (CPM) developed by Margie Wright in the 1950s. PEG is used to identify the tasks that need to be completed in order to complete a project, as well as the time and resources needed to complete them.