---
title: Test duration and switching logic
description: Understand how CPP A/B Testing determines how long a test runs and how switching behavior is configured.
---
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# Test duration and switching logic
CPP A/B Testing calculates test duration and switching periods based on your ad group’s traffic and the settings you choose.
This page links to articles that explain the statistical concepts behind duration, how the system estimates duration, and how switching periods are chosen for Switch tests.
### Understand desired precision and reliability
- [**Statistical background of CPP A/B Testing**](https://helpcenter.mobileaction.co/en/statistical-background-of-cpp-a-b-testing?hsLang=en)Learn the statistical background of CPP A/B Testing.
### Understand how duration is calculated
- [**How is test duration calculated in CPP A/B Testing**](https://helpcenter.mobileaction.co/en/how-is-test-duration-calculated-in-cpp-a-b-testing?hsLang=en)Learn how the system converts conversion rate, confidence level, desired precision, and taps into an estimated duration.
### Understand how switch periods are chosen
- [**How are switch periods chosen in CPP A/B Testing**](https://helpcenter.mobileaction.co/en/how-are-switch-periods-chosen-in-cpp-a-b-testing?hsLang=en)Learn how minimum traffic thresholds and fluctuation checks determine hourly, daily, or weekly switching.
### Related links
- [**About CPP A/B Testing**](https://helpcenter.mobileaction.co/en/about-cpp-a-b-testing?hsLang=en)
- [**What are the requirements and limits for CPP A/B Testing**](https://helpcenter.mobileaction.co/en/what-are-the-requirements-and-limits-for-cpp-a-b-testing?hsLang=en)
- [**Test setup options in CPP A/B Testing**](https://helpcenter.mobileaction.co/en/test-setup-options-in-cpp-a-b-testing?hsLang=en)
- [**Test creation in CPP A/B Testing**](https://helpcenter.mobileaction.co/en/test-creation-in-cpp-a-b-testing?hsLang=en)
- [**How do you monitor and interpret tests in CPP A/B Testing**](https://helpcenter.mobileaction.co/en/how-to-monitor-cpp-a-b-tests-in-the-dashboard?hsLang=en)
---
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