“Software is opaque by default, it must generate data in order to clue humans in on what is going on. Observable systems allow humans to answer the question “is it working properly?”, and diagnose the scope and impact and identify what is going wrong if the answer is no. Observable systems not only have the data available to understand them but the data is accessible explorable and understandable in a fast user-friendly manner.” Great o11ycon post-mortem from InfoQ.
