Consider a TAS that is going to be deployed for the first time.

When deploying a Test Automation System (TAS) that requires shared resources and operates in its own test environment, the most effective way to mitigate the risk of existing applications not working due to resource conflicts is to perform compatibility testing in the target environment. This type of testing will help identify any issues where the TAS might interfere with the operation of existing applications that rely on the same resources. By addressing these compatibility issues before the TAS goes live, the risk of operational disruptions can be significantly reduced. This approach is supported by best practices in test automation, which emphasize the importance of ensuring that new systems work harmoniously within the established infrastructure without causing conflicts or errors12.

References = The ISTQB CT-TAE materials and guidelines highlight the importance of analyzing deployment risks and identifying technical issues that could lead to the failure of the test automation project. Compatibility testing is a key activity in this process, as it helps ensure that the TAS will function correctly alongside existing applications and within the current infrastructure34.