我们在 IT 系统设计中发现的功能 金字塔面临着另一个挑战：构建底层的人员不仅需要移动大量的材料，还必须预测构建上层的团队的需求。在 IT 金字塔中，这一点要难得多，因为事物往往会随着时间的推移而发展（第 3 章）。
纯粹自下而上地构建 IT 金字塔会产生几个问题： ...
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