ITEM TOOLKIT

Chapter 9 Markov 213
any number of states, and can therefore also consist of a single state; a given state can belong to any number of state
groups. Groups are created to compute aggregate results, such as the expected time spent in any of the states in a
group.
34. The simplest method to create a new group is to click the Add Group toolbar button while in the Markov model editor.
The new group, with a default name, is shown in the Markov hierarchy in the lower left corner of the ToolKit
window. Once states are added to a group, this will also be made visible there.
35. States are added to a group in the State Parameters dialog. To open this dialog, right-click on the state, and select the
State Parameters option in the popup-menu. Then, make the Groups tab in that dialog visible.
36. The left part of the tab lists all the groups that have been created so far. New groups can be added by clicking the Add
New Group button. Unnecessary groups can be deleted by selecting them and clicking the Delete Selected Group
button. Note that this will only delete the group definition, but not the states contained in the group.
37. When a group is selected, its name and description are made visible in the corresponding fields. The fields can be used
to change names and descriptions.