Run a simulation

Initialize and run a simulation

Once the system is setup and data is loaded to the database, SimSyn simulations are initialized and run in four simple steps:

1. Connect one or multiple database tables by specifying respective database parameters.
2. Browse for a VENSIM model and load it to SimSyn.
3. Add data link(s) and define their use as ‘Time Series’ (TSL) or ‘Subscript’ (SDL). Time may optionally be defined for Time-dependent subscripting links.
4. Run the simulation.

Fig. 3. SimSyn Interface

In the example above (see Fig. 3) a model of teacher’s unemployment is loaded to SimSyn. The table column ‘num’ of database table named ‘num_students’ is linked as subscript to a VENSIM model variable named students_overall. In this way, 100 simulations (one for every row in column ‘num’) were run (see results in Fig. 5). Simulation outputs are written to the same database. The output table name is ‘sim_out’ per default.

The use of multiple data links is exemplified in Neuwirth (2017).