Software development depends on a wide variety of intertwining factors and dependencies. Because of their complexity, projects often have a bad track record for sprouting quality, usability, cost, schedule and overrun risks.
Project managers must overcome a large array of challenges in order keep their projects on track and within budget. They have many factors to consider, including external and internal aspects that may cause a project to fail.
Fixed price contracts can be rather tricky in a Scrum environment. Classic software development and Agile software development are very different from one another, and things that work in one environment don’t necessarily work in another.