# Assumption Categories
URL: https://docs.valsight.ai/assumption-categories/
Description: Assumption Categories help structure assumptions in the Scenario Manager, making it easier to filter, organize, and analyze assumptions effectively. This fea…
Assumption Categories help structure assumptions in the **Scenario Manager**, making it easier to **filter, organize, and analyze assumptions** effectively. This feature replaces the previous “Assumption Properties” functionality, providing a **more intuitive and accessible** way to categorize assumptions.

![image-20250304-092348.png](./images/5986648068.png)

Admins can now create assumption categories directly in the user interface. Each assumption category can have predefined **values**, allowing users to **tag assumptions** with relevant labels such as priority levels, statuses, or assumption types.

## Key benefits of Assumption Categories

* **Improved organization**: Categorize assumptions with custom labels for better structure.
* **Enhanced filtering**: Easily focus on relevant assumptions in the Scenario Manager.
* **Customizable properties**: Define assumption categories and values that fit your project needs.

## How to create and manage Assumption Categories

### 1. Creating an assumption category

1. **Navigate to the Assumption Categories page**:

   * Open the **Scenario Manager**.
   * Click on **+ Add** → **Configure Assumption Categories**.
   * Alternatively, go to **Project Settings** and click **Configure Assumption Categories** under the Assumption Categories section.

![image-20250304-104823.png](./images/5985796131.png)

2. **Add a new category**:

   * Click **Add Category**.
   * Enter a **name** (max 70 characters, no special characters).
   * (Optional) Add a **description** to clarify the category’s purpose.
   * Click **Save** to create the category.

![image-20250304-104857.png](./images/5986058251.png)

### 2. Adding values to a category

1. Open an **existing assumption category**.
2. Click **Add Value**.
3. Enter a **value name** (e.g., "High", "Medium", "Low").
4. Select a **color** for better visualization.
5. (Optional) Set a **default value** (this will be preselected when tagging assumptions).
6. Click **Save**.

![image-20250304-105025.png](./images/5986254878.png)

### 3. Editing or deleting categories and values

* Click the **three-dot menu** next to a category or value to **edit** or **delete** it.
* Deleting a category will remove it from all associated assumptions (confirmation required).

![image-20250304-105141.png](./images/5985959953.png)![image-20250304-105213.png](./images/5986615305.png)

## Using Assumption Categories in the Scenario Manager

* Once categories and values are set up, users can **assign them** to assumptions.
* Categories appear as **sortable and filterable columns** in the **Scenario Manager**.
* Values are displayed as **colored tags**, making it easy to differentiate assumptions.

## Additional notes

* **Project Admins** can create and modify assumption categories.
* Categories and values are stored at the **project level**.
* Changing the order of categories **affects bridge calculations** and may alter scenario results.