If you plan to extend one of the Scheduler optimization models : GA, GS, GSLP, to add extra constraints or objectives you need to have a minimum understanding of the underlined CPO modelingYou can start by look at the IBM ILOG CPLEX Optimization Studio documentation hereor subsection Designing scheduling models A presentation of the basic CPO modeling elements and of the internal Scheduler optimization modeling is available hereIt describes how intervals, intensity, cumul functions, alternative constraints... are used#AssetandFacilitiesManagement#Maximo#MaximoScheduler