[color=#000000][size=200]Software for modelling dynamic systems, with a special flow chart: [list][*][b]Stella [/b](since 1995)[br][/*][*][b]Powersim[/b][br][/*][*][b]Dynasys[/b][/*][/list][/size][/color]

[size=200][color=#000000]New different perspective: [b]change rates[/b]! [br]But not easy to handle either. Tool for experts.[/color][/size]