What is a device matrix?

Device Matrix — is a table or list that includes various devices, browsers, operating systems, and their versions on which software testing is conducted. It helps determine the optimal set of environments for testing based on the target audience of the product, its functionality, and requirements.

Main elements of the device matrix:

• Devices: List of physical devices (smartphones, tablets, computers, IoT devices) from different manufacturers and models.
• Operating Systems: List of operating systems installed on devices (e.g., iOS, Android, Windows, macOS, Linux) with their versions.
• Browsers: List of web browsers (Chrome, Firefox, Safari, Edge) with their versions used to access web applications.
• Screen Resolution: Various screen resolutions that need to be supported.
• Network: Types of network connections (Wi-Fi, Cellular 3G/4G/5G) and their speed.

Advantages of using a device matrix:

• Coverage: Ensures testing on the most relevant device and environment combinations for the user.
• Optimization: Helps avoid excessive testing on rarely used combinations, saving time and resources.
• Prioritization: Allows identifying testing priorities on the most critical or common environments.
• Documentation: Serves as an official document defining the scope of testing across different environments.

Example of a simple device matrix for a web application:

Device	OS	Browser	OS Version	Browser Version	Note
Desktop (PC)	Windows 10	Chrome	21H2	Latest	Main scenario
Desktop (Mac)	macOS Sonoma	Safari	14.3	Latest	For Mac users
Mobile (Android)	Android 13	Chrome	13	Latest	Most popular
Mobile (iOS)	iOS 17	Safari	17	Latest	For iPhone users
Tablet (Android)	Android 12	Chrome	12	Latest	For tablets

Creating and maintaining a device matrix is an important part of the testing strategy, especially for products that need to be accessible across a wide range of platforms.