The relations diagram analyzes complex cause-and-effect. Enter factors (one per line) and express causal links as "Cause → Effect". The system automatically computes each factor's in/out degree to identify key factors.

The system diagram (tree diagram) decomposes an objective layer by layer into means. Enter the goal and the means at each level, using indentation to show hierarchy (2 spaces per level).

PDPC (Process Decision Program Chart) starts from the initial state, predicts risks that may arise during execution, and pre-builds countermeasures. One step per line, format: "Step | Risk | Countermeasure".

The matrix diagram rates the strength of association between row items and column items. Per row: Row item,strength col1,strength col2... (strength: 3=strong, 2=medium, 1=weak, 0=none). The first row holds the column headers.