度量

Build great metrics. Metrics show how the machine is working by providing numbers and setting off alert lights in a dashboard. Metrics are an objective means of assessment and they tend to have a favorable impact on productivity. If your metrics are good enough, you can gain such a complete and accurate view of what your people are doing and how well they are doing it that you can almost manage via the metrics alone.

度量是备受争议的一个词，因为它的负面作用，很多人都不敢度量，其实好的度量是非常必要的，它能客观地反应一个人或一个组织是否运转良好。

In constructing your metrics, imagine the most important questions you need answer in order to know how things are going and imagine what numbers will give you the answers to them.

那我们应该构造哪些度量呢？我们要先问自己最想知道哪些问题的答案。比如你想知道团队目前的效率和质量如何，那么就要围绕这两个方面建立度量，比如每个迭代能够交付的用户故事点数，每个迭代上线后产生的严重bug数等等。如果你想知道支持团队的服务质量，就要看一个问题从提出到响应需要多少时间，一个问题从提出到完全解决需要多少时间。

需要提醒的是构造度量的输入数据必须是准确的，否则度量的结果很容易误导人。另外不能尽信度量，要综合各种数据和因素，全面地分析度量背后的真相。