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Speed

7 九月, 2015 - 12:26

In more recent years, concerns with the speed of the development process have overshadowed the search for increased productivity. If you follow the waterfall process literally, a medium-to-large system would take anywhere from 18 months to three years to develop. During this time, you are spending money without any true guarantee of success (see the statistics on number of failed projects above), with none of the benefits of the new system accruing. It is a little bit like building a railroad from Chicago to Detroit, laying one rail only, and then laying the second rail. If instead you lay both rails at once, you can start running reduced service from Chicago to Gary, then to South Bend, and so one, starting to make some money a lot earlier.

Another factor that increases the need for speed is that the requirements of the business changes more quickly than in the past, as the result of external pressure – mainly from competitors but also from regulatory agencies, which mandate new business processes and practices. Eighteen months after your idea for a new system, that idea may already be obsolete. And if you try to keep up with changes during the development process, you are creating a moving target, which is much more difficult to reach.