Vensim software work required for 3 students 3 copies
Dr. Daniel Xing(x.xing3@liverpool.ac.uk)
EBUS-504
Operations Modelling and Simulation
System Dynamic software: Vensim
University of Liverpool
Management School,
UK
Menu and Tool Bar
Source: ®VENSIM 2012
Layout
Source: ®VENSIM 2012
MENU
• File : Open Model, Save, Print, dll.
• Edit : copy and paste, search, dll
• View : manipulating the sketch of the model and for viewing a model
• Layout : manipulate the position and size of elements in the sketch.
• Model : Simulation Control and the Time Bounds dialogs, the model
checking features, and importing and exporting datasets.
• Tools : sets Vensim's global options and allows you to manipulate Analysis
tools
• Windows : to switch among different open windows.
• Help : provides access to the on-line help system.
Source: ®VENSIM 2012
Toolbar
Source: ®VENSIM 2012
Sketch Tools Lock — sketch is locked. Move/Size — move, sizes and selects sketch objects: variables, arrows, etc. Variable — creates variables ( Constants , Auxiliaries and Data). Box Variable — create variables with a box shape (used for Levels or Stocks). Arrow — creates straight or curved arrows. Rate — creates Rate (or flow) construct Model Variable — adds an existing model variable Shadow Variable — adds as a shadow variable Merge — merges two variables into a single variable, etc Input Output Object — adds input Sliders and output graphs and tables to the sketch. Sketch Comment — adds comments and pictures to the sketch. Unhide Wand — unhides (makes visible) variables in a sketch view. Hide Wand — hides variables in a sketch view. Delete — deletes structure, variables in the model, and comments in a sketch. Equations — creates and edits model equations using the Equation Editor. Reference Modes — use to draw and edit reference models.
Source: ®VENSIM 2012
Tools
Source: ®VENSIM 2012
Tools
Source: ®VENSIM 2012
Tools
Source: ®VENSIM 2012
Analysis Tool Output
Source: ®VENSIM 2012
• Variable allows you to choose a variable in your model and select it as the Workbench Variable.
• Time Axis allows you to change or focus the period of time over which Analysis tools operate.
• Scaling enables you to change the scales of output graphs. • Datasets allows you to manipulate the stored datasets (runs). • Graphs brings up the Custom Graph Control. • Placeholders is a control that sets Placeholder Values
Control Panel
Source: ®VENSIM 2012
Source: ®VENSIM 2012
Code behind the model
Source: ®VENSIM 2012
Operators
Source: ®VENSIM 2012
Example notation
Source: ®VENSIM 2012
Settings
Source: ®VENSIM 2012
Settings – iInfo/Psswd
Source: ®VENSIM 2012
Settings - Sketch
Source: ®VENSIM 2012
Settings - units
Source: ®VENSIM 2012
Dr. Daniel Xing(x.xing3@liverpool.ac.uk)
EBUS-504
Operations Modelling and Simulation
System Dynamic software: Vensim
University of Liverpool
Management School,
UK