DATA-ORIENTED DESIGN The hardware will thank you.
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Data Oriented Design relies on data, so unless you have tools and techniques for doing just that, you're working blind. Here is a post by Sean Houghton on how he analyses data from play sessions.
The analysis of telemetry can have similarities to aspects of tuning for your data. Sometimes you can only make the necessary mental connections by finding new ways to visualise what's really going on. The more chances you give yourself to recognise patterns, the higher the chance you can find out something very useful.