Analysis

A horizontal bar chart used in sensitivity analysis to compare the relative importance of uncertain variables.

How It Works

• Each bar represents one variable's range of impact on the outcome
• Sorted largest (top) to smallest (bottom) — tornado shape
• Wider bar = project is more sensitive to that variable

Commonly used in quantitative risk analysis to identify which risks have the greatest potential impact.

A graphical representation of a decision-making situation showing relationships between decisions, uncertainties, and outcomes.

Components

• Rectangle: Decision nodes (choices)
• Oval: Uncertainty nodes (chance events)
• Diamond/Hexagon: Value/Objective node (outcome being optimized)
• Arrows: Influence relationships

Provides a high-level view before detailed analysis. Often used as a precursor to decision trees.

An extension of a scatter plot where a third variable is represented by bubble size.

Typical Uses

• Risk analysis: X = probability, Y = impact, Size = urgency or cost exposure
• Portfolio management: Compare projects by value, cost, and risk simultaneously
• Stakeholder mapping: Power, interest, and influence in three dimensions