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

# FAQ

> When to use AI agents, scripts, and manual QA.

## When to Use AI Agents vs Scripts

| Scenario                             | AI Agents                                                                      | Scripts                             | Manual QA                             |
| :----------------------------------- | :----------------------------------------------------------------------------- | :---------------------------------- | :------------------------------------ |
| **Exploratory testing**              | ✅ Best - discovers edge cases through varied behavior                          | ❌ Fixed paths only                  | ✅ Good - but slow and expensive       |
| **Regression testing**               | ✅ Good - handles UI changes gracefully                                         | ✅ Best - fastest execution          | ❌ Too repetitive                      |
| **Exact same steps every time**      | ⚠️ Possible but overkill                                                       | ✅ Best - fully deterministic        | ❌ Error-prone over time               |
| **Testing multiple user flows**      | ✅ Best - tries different approaches automatically                              | ⚠️ Need separate script per variant | ✅ Good - but doesn't scale            |
| **Complex calculations**             | ❌ Use assertions in code instead                                               | ✅ Best - precise math               | ⚠️ Manual calculation prone to errors |
| **Form filling with realistic data** | ✅ Best - understands context                                                   | ⚠️ Need hardcoded test data         | ✅ Good - but tedious                  |
| **Testing preview environments**     | ✅ Best - [automatic PR reviews](/configuration/github-app)                     | ⚠️ Need CI/CD integration           | ❌ Requires manual coordination        |
| **First-time test coverage**         | ✅ Best - [AI Chat Assistant](/core-concepts/ai-chat-assistant) sets up quickly | ❌ Requires upfront investment       | ⚠️ Slow to establish baseline         |

In practice, most teams use a combination: AI agents for exploration and edge cases, scripts for critical deterministic flows, and manual QA for subjective evaluation (design, UX, brand consistency).