AFT Arrow has three optional add-on modules which extends modeling capabilities into other areas. The modules allow multi-variable goal seeking and control simulation, full system sizing, and time varying simulation. The Modules panel withing the Modules group in the Analysis Setup window allows you to activate and enable any of the three AFT Arrow add-on modules. An additional license to the base AFT Arrow license is required to use a module. These modules include:

• GSC (Goal Seek & Control) - Identifies output parameters that yield desired output values and simulations control functions.

• ANS (Automated Network Sizing) - Evaluates the complex interaction of system variables to reveal combinations of cost savings.

• XTS (Extended Time Simulation) - Models dynamic system behavior and how critical system parameters vary over time.