Fenix+ allows you to set the threshold parameters of people’s movement paths. To change the default parameters, navigate to the control panel, then go to Simulation | Evacuation Simulation Parameters, select the desired scenario, change the values and click Apply.

Evacuation Routes
Min height and Min width parameters determine the lowest dimensions of route passages or exits that are taken into account by the application when compiling an evacuation calculation scheme. By default, the passages with the height of less than 1.9 meters and a width of less than 0.7 meters are not taken into account.
Changing these parameters could prove useful if your project includes wing gate turnstiles or other speed gates that slow down the people flow to move through exits one at a time.
In Path selection algorithm, you can choose between two options. Use shortest paths option means that the evacuating occupants will choose the path with the shortest distance out of all available options. Use alternative paths will add a probability component to the algorithm, meaning that whether one evacuation path (doorways, ladders) will be chosen for the occupant over the other is dependent on an added variable factor.
Simulation Control
When the option Interrupt simulation when people remain in the high-density flow for a long time is selected, the application automatically interrupts simulation once the threshold for the parameters Critical flow density and Maximum allowed time are reached.

When the evacuation simulation is interrupted, Fenix+ still provides Evacuation Simulation Results to analyze nad make necessary changes to the scenario so that people spend less time in the high-density human flow.
Regardless of set evacuation simulation parameters, the Fenix+ always uses a density of 0.5 m²/m² to determine the duration of congestion, such as in Evacuation Flow Density Map.