HOPEX Process Simulation > Simulating a BPMN process > Scenarios > Scenario Parameters
Scenario Parameters
Main parameters that can be defined in a scenario are:
• Simulation duration,
• Conditions of arrival of requests for work sent to the simulated process
• Characteristics of the resources used.
Simulation duration 
You can indicate the time the simulation will last.
In standard mode, you can define a start date and a warmup period. This latter parameter corresponds to the period required by the system to reach a point from which performance is optimum, no result being collected until this period has elapsed.
You can also restrict result collection to a given period. For example, based on a simulation over the entire year, you can display only those results for a particular month.
Input flow 
The Input Flow tab enables definition of the characteristics of tokens generated by the simulator to represent the work requests.
*When a process can be triggered by several events, you must specify which of these should be taken into account in the scenario.
By default, tokens are introduced continuously and at regular intervals. You can specify the average time interval between two arrivals.
In standard mode, you can create a Schedule to define the period of activity of the generator. For more details, see Generator Schedules.
Through the use of objects of Input Schedule type, you can also define arrival of a variable number of tokens on fixed days at fixed times. In this case, you must indicate the number of tokens introduced at each due date by using a statistical law and its parameters.
Resource availability
Human resources 
To access the org-units available in a scenario:
1. In the simulation editor, select the scenario.
2. In the right pane, select the Resources tab.
3. For each org-unit, indicate the quantity available in the Quantity column.
You can arrange that org-units are automatically created according to requirements. This lets you know the maximum number of org-units required in parallel for execution of the process.
*To do this, select Automatic Creation.
In this case, the quantity that you may have defined for the org-unit is not taken into account. On completion of simulation, the Quantity box is then automatically entered as a function of the units created.
Other resource 
To access a resource from a scenario:
1. Select the scenario.
2. In the right pane, select the Resources tab.
For each resource you can indicate:
• If it is a consumable or not (for resources other than human resources).
• Its available quantity.
• Automatic creation of this resource.
*If you select this check box, the quantity is then calculated automatically at the time of simulation as a function of the units created.