at which meaningful evolution could be possible. Roadmap Agility a.gil.i.ty The state or quality of being agile; nimbleness. The American Heritage Dictionary of the English Language, Fourth Edition Although the concept of mutability focuses more on the ability to change, agility is concerned more with the rate which such a change is possible. An entity that is receptive to change, yet not agile enough, may struggle to survive through conditions that demand better agility. In the context of roadmaps, we could define agility as a measure of the rate at which changes are accepted and implemented as part of the roadmap. We define this measure to start at the arrival of a valid request for a change in roadmap and measure the time taken for the change to be reviewed, evaluated, and incorporated as part of the roadmap. CHAPTER 5 NETWORK ROADMAP EVOLUTION At periods that are deemed to be critical to the network or product, it may be a valid expectation for an organization to be able to respond very quickly to change requests. Agility at such times may be the x-factor that helps a good product that is slow to respond to changes become something close to a market leader. Such agility needs a culture of understanding between the stakeholders of the product: a shared vision and singleness of purpose to make changes happen in the product and overcome their personal differences to achieve a greater goal-that of product betterment. Summary This chapter began by looking at planned evolution to the networks roadmap. We defined the concept of network resilience and looked at different models this. We also walked through a strategy of reactive evolution for sudden changes, illustrated with a specific example for using a suggested template. We then suggested ways in which industry changes could be anticipated. We also looked at ways in which future goals for business and services could be used as a tool to help manage evolution of the roadmap. We then went through organizational factors that could help in roadmap evolution-that of d