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DECISION ANALYSIS WITH TREEPLAN 589

Adding a Branch
The PDC problem has three decision alternatives (small, medium and large com-
plexes), so we must add another decision branch to the tree.
Step 1. Select cell B5
Step 2. Select the Tools menu and choose Decision Tree
Step 3. When the TreePlan Decision dialog box appears:
Select Add branch
Click OK
A revised tree with three decision branches now appears in the Excel
worksheet.

Naming the Decision Alternatives

The decision alternatives can be named by selecting the cells containing the labels
Decision 1, Decision 2 and Decision 3, and then entering the corresponding PDC
names Small, Medium and Large. After naming the alternatives, the PDC tree with
three decision branches appears as follows:

Adding Chance Nodes
The chance event for the PDC problem is the demand for the units, which may be
either strong or weak. Thus, a chance node with two branches must be added at the
end of each decision alternative branch.
Step 1. Select cell F3
Step 2. Select the Tools menu and choose Decision Tree
Step 3. When the TreePlan Terminal dialog box appears:
Select Change to event node
Select Two in the Branches section
Click OK

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