Which statement about test estimation approaches is correct?

The statement that test managers predict expected testing effort for different activities is correct because effective test estimation is a critical component of project planning and resource allocation in software testing. Test managers utilize their experience, knowledge of the project requirements, and understanding of the testing processes to make informed predictions about the effort and resources needed for each testing activity. This involves considering various factors such as the complexity of the software, the testing environment, and the skills of the team members involved.

By accurately estimating the testing effort, test managers can facilitate better planning, ensure that resources are allocated appropriately, and help avoid delays in project timelines. This proactive approach allows for a smoother testing process, as stakeholders can be informed of what to expect in terms of time and resource investment.

In contrast, while project test measures may inform estimates, they are typically not available until testing is well underway, which can limit their usefulness. Additionally, although expert input can help refine estimations, it is not solely reliant on recommendations from client-designated users. Using an average of costs from past projects can also be informative, but the unique aspects of each project often require tailored estimates rather than a blanket average. Therefore, the role of test managers in predicting effort stands as a cornerstone in the test estimation process.