> ## Documentation Index
> Fetch the complete documentation index at: https://docs-v1.latitude.so/llms.txt
> Use this file to discover all available pages before exploring further.

# Composite Scores

> Combine the results of multiple evaluations into a single score.

Composite Score evaluations combine multiple existing evaluations into a unified score. This is ideal for measuring overall quality by aggregating various aspects of your prompt's performance, such as combining accuracy, safety, and relevance metrics into one comprehensive assessment.

* **How it works**: Runs multiple existing evaluations and combines their results using different mathematical approaches (average, weighted, or custom formula). Note that sub-evaluations do not create their own results!
* **Best for**: Holistic quality assessment, combining multiple evaluation criteria, creating overall performance metrics, balancing trade-offs between different aspects (e.g., accuracy vs. safety).
* **Requires**: At least two existing evaluations configured on the same prompt. These evaluations can be of any type, even other Composite Scores!

<Note>
  Currently, composite evaluations cannot run in live mode and only support
  sub-evaluations that do not require an expected output. Check out the [Running
  Evaluations](/guides/evaluations/running-evaluations) guide.
</Note>

## Setup

<Steps>
  <Step title="Go to evaluations tab">
    Go to evaluations tab on a prompt in one of your projects.
  </Step>

  <Step title="Combine evaluations">
    On the top right corner, click on the "Combine evaluations" button.
  </Step>

  <Step title="Choose a metric">
    <img
      src="https://mintcdn.com/latitudellms/GDBu0v0Yc5OmPrEQ/assets/composite-score-metric-dropdown.png?fit=max&auto=format&n=GDBu0v0Yc5OmPrEQ&q=85&s=76f586fb6b54fa482dccbec265ef0a67"
      alt="Choose Composite Score
metric"
      width="1332"
      height="362"
      data-path="assets/composite-score-metric-dropdown.png"
    />
  </Step>

  <Step title="Select sub-evaluations">
    Select the evaluations you want to combine. You need to select at least two
    evaluations. <img src="https://mintcdn.com/latitudellms/GDBu0v0Yc5OmPrEQ/assets/composite-score-sub-evaluations.png?fit=max&auto=format&n=GDBu0v0Yc5OmPrEQ&q=85&s=46b25bd4ca9f8aae582e5e8104c8371a" alt="Select
    sub-evaluations" width="1332" height="836" data-path="assets/composite-score-sub-evaluations.png" />
  </Step>
</Steps>

## Metrics

<ParamField path="Average">
  Combines scores evenly. The resulting score is the average.
</ParamField>

<ParamField path="Weighted">
  Combines scores using custom weights. The resulting score is the weighted
  blend. Weights are measured in percentage and must add up to 100%.
</ParamField>

<ParamField path="Custom">
  Combines scores using a custom formula. The resulting score is the result of
  the expression. The expression can be a complex mathematical formula.
</ParamField>