Figure 3
A hierarchical decision diagram is divided into four levels indicated by dashed horizontal lines labeled on the right as “Level 1”, “Level 2”, “Level 3”, and “Level 4”. At Level 1, a textbox at the top center is labeled “Aim of the decision”. At Level 2, two textboxes appear below it labeled “Criterion 1” and “Criterion 2”. A diagonal line connects “Aim of the decision” to “Criterion 1”, and another diagonal line connects “Aim of the decision” to “Criterion 2”. At Level 3, five textboxes appear arranged horizontally, labeled “Subcriterion 1.1”, “Subcriterion 1.2”, “Subcriterion 2.1”, “Subcriterion 2.2”, and “Subcriterion 2.3”. Lines connect “Criterion 1” to “Subcriterion 1.1” and “Subcriterion 1.2”. Lines connect “Criterion 2” to “Subcriterion 2.1”, “Subcriterion 2.2”, and “Subcriterion 2.3”. At Level 4, three textboxes appear labeled “Alternative 1”, “Alternative 2”, and “Alternative 3”. Multiple diagonal lines connect each subcriterion box to all three alternatives.The four-level problem hierarchy