What is The Critical Analysis Room For?
Westworld Guide
The Critical Analysis room is another facility that you can build inside your control room as you progress in the game. Basically, what it does is conduct an interview with a particular host in your park (one that is not currently doing any interactions, journeys, or tasks).
There will be a series of question for that sampled hosts and you should take the time to answer them. When you complete the activity, it will reward you with random items, or basic host codes. This is one way to generate basic hosts (1-star) that can be used later to rebuild higher tiered hosts.
You can perform as much as three interviews every day so you'd have a chance to get as much as three basic host for all the trouble. This might not be much, but as you perform it regularly, it will soon add up and nonetheless give your 3-5 star hosts a bit of boost when you sacrifice them for a "Rebuild".