Levels are analogous to
generations of a family: The parents are always positioned first, and the children are placed at
succeeding levels. The root decision-tree level is preserved for the root node??”for that matter,
for the root attribute. Subsequent levels positioned downward should be assigned to lower-level
business priorities. The process for constructing decision-tree structures is depicted in Exhibit 5.3
and summarized as follows:
1. Select an attribute set. Start with the sweet spot attributes sets first. Hot spots should
be pursued in the next iterations if the first attempts do not provide satisfaction.
2. Construct a conceptual decision-tree structure. Continue with the overall tree structure
construction. Major considerations should be given to the attribute priority levels.
Therefore, the most dominant attribute in the collection should always be placed on the
root-level node to denote business requirement priorities. In Exhibit 5.3, the liquidity
attribute is presented by the root node.
92 Ch. 5 Conceptual Service Identification
Liquidity?
Return? Return?
Sweet Spot
Attributes
(Liquidity,
Returns)
Business Priority
Level 1
Business Priority
Level 2
EXHIBIT 5.3 CONCEPTUAL DECISION TREE WITH BUSINESS PRIORITIES
3. Prioritize attributes and complete node positioning. Next, add more tree nodes and
place the remaining attributes toward the bottom of the decision tree by forming decision
levels in which attributes are classified by their business priorities.
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