Manager In A Strange Land: Dependencies, Part Two (29 Nov 2004)
Fred can't work on task B because he's working on task A. Usually you just live with this, unless task B is on the critical path, in which case Fred task switches and you live with the fact that now task A is coming in late. If both task A and task B are on the critical path, you can bring in another employee to replace Fred on task B. What if Fred's the only one that can do task A and task B? Then you have a bottleneck. It's time to train another employee to do Fred's job. Even if it takes this new employee many times longer to accomplish the same thing that Fred could do, it's worth it, because it will bring your project in sooner.
Article URL: http://www.gamasutra.com/features/20041129/fristrom_01.shtml
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