03 Jan 2020
The Guide to Product Metrics
“If we improve this number will the product’s long-term performance improve?”
Single-mindedly maximizing your focus metric can hurt your product. For example, if a news site cares only about videos watched, they might autoplay videos once a page loads. This ultimately frustrates visitors who don’t want to watch the content and drives them to a competitor’s site, reducing retention. Focus metrics should be the top priority, not the sole priority, and improving the focus metric should not be accomplished at the expense of harming other KPIs.
尽管可有很多指标，但是 Having too many goals can be just as ineffective as having none, because everyone will have different ideas about where to spend their time to make the product successful.
Industry-specific metric examples
Leading indicators are like inputs. They measure the activities necessary to achieve your goals. Lagging indicators are like outputs. They measure the actual results.
有指标但是没有人对此负责，或者说模糊不清。比如Server Costs per Month，用户越来越多成本肯定是在上升，但是上升是好还是坏这个指标说不清，于是改用Cost per 1 Billion API Calls ，这样就可以很清晰的看到工程效率。
We display the dashboard on a wall-mounted screen in our office. When we walk to the bathroom we can’t help but read it.
It’s impossible for us to hide from failure.
First, you have to decide what you want to learn. Then, you figure out how you’re going to measure it. And only after that do you build your experiment.Before you build anything — product, marketing campaigns, whatever, decide what you’re going to learn from building it.