Defining Vectors Using Stochastic Elements

In addition to using Data elements to create vectors, you can also create vectors using Stochastic elements. If you define a Stochastic element An element that can be used to quantitatively represent the uncertainty in a model input. as a vector A one-dimensional array., rather than inputting a single probability distribution A mathematical representation of the relative likelihood of a variable having certain specific values. It can be expressed as a PDF (or a PMF for discrete variables), CDF or CCDF., you specify a set of probability distributions (one for each item of the vector).

If you specify the Stochastic as a vector (by specifying a set of array labels A collection of labels identifying the items of an array. via the Type... button), the dialog for defining the distribution (accessed via the Edit Distribution... button) will look similar to this:

All the inputs to the Stochastic must be vectors.