Despite rumours to the contrary, there are planning activities in the agile model. In this class we’ll discuss how to plan releases, and present story mapping and impact mapping as effective tools for design, ideation and planning.
optimism rather than on a rational weighing of gains, losses, and probabilities. They overestimate beneﬁts and underestimate costs. They spin scenarios of success while overlooking the potential for mistakes and miscalculations. As a result, they pursue initiatives that are unlikely to come in on budget or on time or to deliver the expected returns—or even to be completed.” Kahneman, Thinking Fast and Slow, p252.
haven't found that those costs have a signiﬁcant information value for the investment decision… The single most important unknown is whether the project will be canceled. The next most important variable is utilization of the system, including how quickly the system rolls out and whether some people will use it at all.” Douglas Hubbard | http://www.cio.com/article/119059/The_IT_Measurement_Inversion