研究者通过真实世界研究获取的数据被称为“真实世界数据”（Real World Data，RWD）
一些真实世界数据包括 100 万个流程实例（最多包含 500 万个人工任务）占用 100GB，5000 万个流程实例（没有人工任务）占用 1TB。
Some other real-world figures included about 100GB for one million process instances including up to 5 million human tasks and 1TB for about 50 million process instances (no human tasks).
封装：软件对象就是包含模拟真实世界的对象的物理属性(数据)和功能(行为)的离散包。
Encapsulation: a software object is a discrete package containing both the physical properties (data) and the functionality (behavior) that mimics its real-world counterpart.
可以预见的，要面对关于自己社交世界真实，却又残酷的数据-特别是当它否定了一个用户所相信的，或者想要相信的东西的时候-是很困难的。
Predictably, being faced with hard, empirical data about your social world — particularly if it contradicts what a user believes, or wants to believe — can be difficult.
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