Unsustainable Software Development and its Causes: "Unsustainable development is an all-too common situation today in the software industry. Unsustainable development is a development pace that is typified by stress, frustration, and a sense of not being in control. It is most evidenced by a continually increasing cost of change and defect rate and a corresponding decreasing ability to respond to changing conditions. This chapter explains how unsustainable development begins, and how to head it off before it spirals out of control. "