4 DEFECT PREVENTION

WHY IS THIS CHAPTER WORTH READING?

In this chapter, you will learn why defect prevention (DP) is important and what the main techniques are regarding the test design. We also provide two examples of requirements refinement, which make the design of the systems to be implemented easier.

Prevention is applied in many areas of our world. We all know that prevention is better than cure. Consider medicine for example. A healthy way of life is not only cost-effective, but it makes living much more enjoyable. In IT we can prevent lots of bugs in many ways. In this chapter we consider defect prevention concerning test design.

It is widely believed that the cost of a defect rises significantly with the project progressing. The clear ...

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