I have several friends who are STEs (Software Test Engineers) who will take exception to the placement of this chapter at the end, wondering why I am choosing to send testers to the "back of the bus," as it were. There are two very good reasons for this:

• Testing is obviously something that is usually done after a product is developed rather than before, which makes putting this chapter at the end sensible.
• The job of the tester overlaps so much of the information contained in this book that if I had not separated it there would have been a million "note to test:" references throughout the book.