Decision Tree

Decision logic as questions, choices and outcomes.

Node types

• DecisionPoint — a question determining which path to follow (default: amber)
• Choice — a potential answer branching from a question (default: blue)
• Outcome — a terminal result (default: green)

Edge types

• decision_to_choice — DecisionPoint → Choice (the question branches)
• choice_to_decision — Choice → DecisionPoint (the option leads to a further question)
• choice_to_outcome — Choice → Outcome (the option terminates)

A decision logic graph for a hiring process showing how a series of questions leads to distinct outcomes:

vgraph hiringDecision: DecisionTree "Should We Hire This Candidate?" {
    // Opening decision point
    node q1: DecisionPoint "Is the candidate technically qualified?";
    node c1: Choice "Yes";
    node c2: Choice "No";

    // Follow-up question for qualified candidates
    node q2: DecisionPoint "Does the candidate fit the team culture?";
    node c3: Choice "Yes";
    node c4: Choice "No";

    // Terminal outcomes
    node o1: Outcome "Extend offer";
    node o2: Outcome "Reject — technical skills insufficient";
    node o3: Outcome "Reject — poor cultural fit";

    // Branch from first question
    edge q1 -> c1: decision_to_choice;
    edge q1 -> c2: decision_to_choice;

    // Path for unqualified candidate leads directly to outcome
    edge c2 -> o2: choice_to_outcome;

    // Qualified candidates proceed to culture question
    edge c1 -> q2: choice_to_decision;
    edge q2 -> c3: decision_to_choice;
    edge q2 -> c4: decision_to_choice;

    // Final outcomes
    edge c3 -> o1: choice_to_outcome;
    edge c4 -> o3: choice_to_outcome;
}

Note: Decision Trees flow top-to-bottom. Every DecisionPoint branches into one or more Choice nodes. Each Choice leads either to another DecisionPoint (continuing the logic) or to an Outcome (terminal result). Outcomes have no outgoing edges.