6.9 Selection Tree Analysis

The selection tree analysis always starts at the root, and the selection tree is then analyzed according to the following principles:

When more than one node or condition exist on the same sublevel in the selection tree, it is analyzed in accordance with a logical OR. That means that one of the nodes or conditions must be true for the analysis to continue on that sublevel.
To reach the next sublevel in the tree, the rating analysis compares all the overlaying nodes and conditions in accordance with a logical AND. That means that all the overlaying nodes and conditions must be true to reach the next sublevel.

The examples below show two selection tree analyzes performed under different circumstances, see Figure 84, Figure 85 and Table 56.

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Figure 84 Example 1 of Selection Tree Analysis

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Figure 85 Example 2 of Selection Tree Analysis

Table 56 Example of Selection Tree Analysis
Example
1 An MMS is to be rated	2 An SMS is to be rated
In this example, the analysis goes into the Message node and finds that the service type is not SMS. It then performs a logical OR with the SMS node, and MMS node and comes to the conclusion that MMS is true.⁽¹⁾ The analysis is then continued in the MMS node. A logical AND is performed on the conditions Decide Service Type, and Decide Price List and comes to the conclusion that it is true and the one hit fee is found and the analysis is finished.	In this example, the analysis goes into the Message node and finds that the service type is SMS. Therefore, no logical OR is performed and the analysis is then continued in the SMS node. A logical AND is performed on the conditions Decide Service Type and Decide Price List and comes to the conclusion that it is true and the one hit fee is found and the analysis is finished.

(1) A logical OR is also performed if more than one condition are grouped on the same sublevel.

The information under the Common definitions icon, is used in the rating analysis when a Link to definition icon is found in the selection tree. For more information regarding linking, see Section 6.8.

The conclusion of the selection tree analysis depends on which modifiers that are used and the characteristics of the solution or product where ERE is integrated.