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Apple just announced the launch of the iPad, Apple's rumored tablet computer. Judging from what we have seen so far, the iPad is basically a very large iPod touch with a modified interface. According to Steve Jobs, the device will be far better than an iPhone or netbook for browsing the web. The iPad will also feature most of the standard apps we have become used to on the iPhone platform, including maps, contacts and a calendar.

A product can be of low quality for several reasons, such as it was shoddily manufactured, its components were improperly designed, its architecture was poorly conceived, and the product's requirements were poorly understood. Quality must be designed in. You can't test out enough bugs to deliver a high-quality product. The quality assurance (QA) process is vital for the delivery of a satisfactory system. In this last part in this series, we will concentrate on portions of the methodology particularly aimed at improving the quality of the resulting system. The software testing techniques described earlier in this series constitute one component of quality assurance, but the pursuit of quality extends throughout the design flow. For example, settling on the proper requirements and specification cannot be overlooked as an important determinant of quality. If the system is too difficult to design, it will probably be difficult to keep it working properly.