Attributes of time distributions

  • ►  On the Base Data menu, click > Distributions > Time.

The Time Distributions list opens.

Note: In lists, you can use the  Attribute selection icon to show and hide attribute values (Selecting attributes and subattributes for columns of a list).

The list contains the following attributes:

Long name Short name Description
Number No Number of time distribution
Name Name Name of the time distribution
Type Type

Type of distribution function:

  • Empirical: Cumulative frequency function. Definition between lower limit and upper limit, with intermediate points in the curve
  • Normal: Normal distribution. Definition between lower limit and upper limit, with mean value and standard deviation
Lower bound Lower bound Minimum duration in seconds
Upper bound Upper bound Maximum duration in seconds
Standard deviation StdDev Can only be changed for normal distribution: Dispersion of values between lower bound and upper bound
Mean Mean Can only be changed for normal distribution: Mean of values between lower bound and upper bound
Showing and editing dependent objects as relation

The attribute and attribute values of this base data type are shown in the list on the left, which consists of two coupled lists.

1.  In the list on the left, click the desired entry.

2.  On the list toolbar, in the Relations list, click > Data points.

The list on the right contains attributes and attribute values of base data objects allocated to the base data object selected in the list on the left (Using coupled lists):

  • Data points: Individual data point values of time distribution. You can insert data points for an empirical distribution. These data points are then displayed as intermediate points in the curve (Editing the graph of a function or distribution).
  • x: Dwell time (s) at data point in curve.
  • At data point 1: Minimum dwell time of selected time distribution
  • Dwell time of additional data points, if defined for the curve of empirical distribution
  • At last data point: Maximum dwell time of selected time distribution
  • FX (f(x)): Probability of dwell time x at data point
  • At data point 1: 0
  • If, for an empirical distribution, additional data points are defined for the curve: Values for probability of dwell time at data point x
  • At last data point: 1

Dwell time distribution is monotonically increasing. This is why each FX value must be greater than or equal to its preceding value.

3.  Enter the desired data.

The data is allocated.

Superordinate topic:

Using time distributions