evolution sources, as identified by the operability management plan, that act as triggers to the roadmap review. The changes to the operability aspects monitored and their impact will be quantified as part of the change triggers. Project Bug Lists Quality concerns that impact project completion could also be deciphered with the project bug lists, which basically contains a list of errors that are ranked as to their severity and impact to the project goals and against specific features. CHAPTER 6 A PROCESS FOR NETWORK ROADMAP EVOLUTION Perform Roadmap Review: Tools and Techniques Variance Analysis In variance analysis techniques, the variance of different dimensions of the project VS. specific goals and measures is computed for different attributes. The variance is quantified and is used to take specific preplanned actions. For example, a schedule variance greater than 10% could trigger action to replan certain features. Trend Analysis In trend analysis techniques, a trend of an item under study is projected by capturing the data and plotting the trend against a timeline. Such a trend chart could indicate where the project is headed and could give early input to the roadmap execution and indicate concerns that need to be addressed to keep the roadmap active. For example, in agile terminology, a release burn down chart is a trend that could help with understanding the health of the release. Management Reviews Most organizations follow a process of review by management representatives, including sponsors for the roadmap, senior management personnel, and other functional owners who have a stake in success of the roadmap and the projects. Management reviews follow a set template in the organization where input is prepared beforehand in a certain manner and is presented during meetings scheduled specifically for that process. These reviews indicate concerns raised by management based on data presented and result in actions that could initiate roadmap change requests. What-if Analysis A what-if analysis uses modeling an