How do I know my testers are doing a good job?

If you're a manager who has testers reporting to you (or if you are a manager who has a manager who etc.), at some point you're going to ask the question: "How do I know they are doing a good job?" Answering that question may come with a few significant challenges attached. There's a good chance you do not have a background in software testing yourself. You probably have a tool that can produce…