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A system that works is more use than a system built on the latest variant of Government and Binding theory that does n't . For example , an automated system that classifies any Web page that contains the word " sex " as sexually explicit will underblock much less , but overblock much more , than a system that classifies any Web page containing the phrase " free pictures of people having sex " as sexually explicit . A signature-based system in general requires significantly less configuration effort than a system to detect anomalies since the latter requires much data collection , analysis , and updating . Comment : Objective F-2 ( n ) was deleted because it is a program requirement , rather than a systems requirement . Why then are we pursuing a system that will defend the world and will be significantly more expensive than a system designed to defend the United States ? More than a system or a single project to implement it , the Natural Systems Program provides an overall framework to design , build , and manage the public and private investment in innovative projects and management tools to achieve sustainable benefits for the long term .