C.9. Distribution types

The Distribution type property defines the distribution of possible time values (scores) of Process elements.

The elements might use one of the following score distribution types on simulation:

  • normal: bell-shaped, symmetrical
  • uniform: rectangular distribution; every score (time period) is applied the same number of times
  • Poisson: negatively skewed normal distribution

C.9.1. Normal

The element values are picked based on the normal distribution type, which is bell-shaped and symmetrical.

Normal distribution type

Processing time (mean)
mean processing time the element needs to be processed (in time unit defined in the time units property)
Standard deviation
standard deviation of the processing time (in time unit defined in the time units property)
Time unit
time unit to be used for the mean processing time and standard deviation values

C.9.2. Uniform

The Uniform distribution or rectangular distribution returns the possible values with the same levels of probability.

Uniform distribution type

Processing time (max)
maximum processing time of the element
Processing time (min)
minimum processing time of the element
Time unit
time unit to be used for the processing time values

C.9.3. Poisson

The Poisson distribution returns the possible values similarly as normal distribution; however, the distribution is negatively skewed, not symmetrical.The mean and the variant are equal.

Poisson distribution type

Processing time (mean)
mean time for the element processing (in time unit defined in the time units property)
Time unit
time unit to be used for the mean processing time