HEC-HMS Tutorials and Guides Current: Advanced Analysis Types in HMS PDF Download PDF Download page Advanced Analysis Types in HMS. Current page Include child pages All pages Advanced Analysis Types in HMS Guidance on using Uncertainty Analysis, Optimization Trials, Ensemble Analysis and using save states to initialize parameters or address watershed changes in long-term simulations. Working with Optimization Trials Uncertainty Analysis Simulations in HEC-HMS Ensemble Analysis Simulations in HEC-HMS Working with Save States ×