Assume you are currently working on a project developing a system where functional requirements are very well specified. Unfortunately non-functional requirements do almost not exist. You are the…

Assume you are currently working on a project developing a system where functional requirements are very well specified. Unfortunately non-functional requirements do almost not exist. You are the Test Manager. You have to choose a technique for test selection that allows testing of non-functional characteristics, especially reliability. Which of the following techniques for test selection do you expect being most useful in this scenario?