Scenario: Your team needs to set up a continuous integration pipeline for Appium tests that run on multiple devices. Describe the approach you would take to ensure stability and scalability in this setup.

Using cloud-based device farms provides scalability and stability for running Appium tests in a continuous integration pipeline. Relying solely on physical devices can limit scalability, running tests only during non-peak hours is not optimal, and deploying on a single server lacks scalability and parallelism.