> For clean Markdown of any page, append .md to the page URL.
> For a complete documentation index, see https://docs.umnai.com/llms.txt.
> For AI client integration (Claude Code, Cursor, etc.), connect to the MCP server at https://docs.umnai.com/_mcp/server.

# Model structure and decision rules

Global Explanations shows the learned model structure and decision rules. Select the intended deployment before browsing its modules and partitions.

## Before you begin

Select a running deployment whose learned structure you want to inspect. Global views do not require a new input record. Keep the underlying model identity with any copied rule so it can be traced to the correct trained output.

## Browse model structure and decision rules

1. Open **Explanation Lab > Global Explanations**.

2. Select the intended **Deployed Model**.

3. Open **Model Structure**.

4. Search for a module and inspect its partitions, conditions, expressions, and intercepts.

5. Switch to **Decision Rules** to read the rules for a selected module.

## Interpret model structure

The Adult Income example reports **19 modules** and **48 total rules**. Those counts describe this model.

| **Model Structure column** | **What to inspect**                                           |
| -------------------------- | ------------------------------------------------------------- |
| Module Name                | The feature or feature combination represented by the module. |
| Partition                  | The displayed partition identifier.                           |
| Condition Expression       | The condition associated with that partition.                 |
| Then Expression            | The expression applied by the rule.                           |
| Intercept                  | The intercept shown for the rule or partition.                |

Long expressions can be truncated in the table. Inspect the decision-rule view before quoting a formula.

The example selects **gender** in **Decision Rules** and shows one rule with condition **All Values**. Its expression includes category terms for **Male**, **Female** and **\_\_MASK\_\_**, with an intercept of approximately **-0.0080**. Read the condition, expression and intercept together.

## Copy rules and open Rule Explorer

Select **Copy Rules** to copy the displayed rules. Select **Open Rule Explorer** to open the dedicated view, where **Rules** and **Code View** provide alternative representations. Use **Back to Global Explanations** to return to the model context.

Use the rules to understand the learned module logic. A module’s rule alone is not a complete explanation of the final model output.

![Model structure with module counts, partitions, conditions, and expressions.](/_fern-files/_img/943024461cb6477c9f9e3ded5a0fac42df86b34e5a66611449e1caf9d2639cd7.webp)

![The selected gender module and its displayed decision rule.](/_fern-files/_img/b8fb29f01fdef61b6030233ff254ebebb36443fc7e3987b104d5ba7192e0f5e8.webp)

Read each partition as a condition paired with the expression applied in that region. Inspect the condition before comparing coefficients: expressions from different regions need not apply to the same values. **All Values** indicates that the displayed rule covers the module's full input region in that view.

A model combines module contributions and applies its output transformation. To connect a global rule to one prediction, return to a local explanation for the same deployment and a specific record.

## Next steps

Continue to [Module dependencies](/ui-guides/explanations/module-dependencies).