Process Instance Arrival Rates

Arrival rates for process instances specify how many process instances of the corresponding process definition will be created in a specific interval.

Specifying Arrival Rate Distributions

Arrival rate distributions for process instances can be specified by three different curves in the properties page Simulation > Arrival Distribution in the property dialog for process definitions:

• The Arrival Rate specified the total, long-term daily arrival rate. The slider value is interpreted as percentage. This means to get the actual availability value you have to multiply the percentage value divided by 100 with the value displayed in the diagram.
• The Business Calendar specifies whether process instances are created at a specific calendar date. This way you can model interruptions on weekends or other holidays. The slider represents the actual value.
• The Daily Distribution describes how the process instances specified with the arrival rate are created over the day. Using this parameter you can specify daily peeks, e.g. at beginning of business. The slider represents the actual value.

Long-term arrival rate, calendar-based arrival distribution and daily distribution are multiplied to obtain the resulting arrival rate, whereby the calendar-based values and daily distribution are relative values. The daily distribution is always adjusted to an integral value of 100%.

For details on the modification of the arrival rate curves see Working With Curves.