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

# Component reuse cot

## Overview

You can reuse the same component for different contexts within a model. In this
example, the TimeRange component is used for both `$workTime` and `$leisureTime`.

We're additionally starting the data structure with a Chain of Thought field
to elicit LLM reasoning for the time range calculation, which can improve
the accuracy of the response.

## Example

```php theme={null}
<?php
require 'examples/boot.php';

use Cognesy\Instructor\StructuredOutput;
use Cognesy\Instructor\StructuredOutputRuntime;
use Cognesy\Polyglot\Inference\LLMProvider;

class TimeRange
{
    /** Step by step reasoning to get the correct time range */
    public string $chainOfThought;
    /** The start time in hours (0-23 format) */
    public int $startTime;
    /** The end time in hours (0-23 format) */
    public int $endTime;
}

$timeRange = new StructuredOutput(
    StructuredOutputRuntime::fromProvider(LLMProvider::using('openai'))
        ->withMaxRetries(2)
)->with(
    messages: [['role' => 'user', 'content' => "Workshop with Apex Industries started 9 and it took us 6 hours to complete."]],
    responseModel: TimeRange::class,
)->get();

dump($timeRange);

assert($timeRange->startTime === 9);
assert($timeRange->endTime === 15);
?>
```