I would like to know what does that mean in the following context:
"The amount of concern and urgency from the Detroit companies has increased in the last month and signicantly ratched up what they're communicating..."
Thank you in advance.
Your title is spelled wrong!
To ratchet something up/down = cause (something) to rise (or fall) as a step in an irreversible process; to increase/decrease something over a period of time. Derives from the a part of a machine which allows movement in one direction only. It is usually a wheel with teeth-like parts which either slide over or lock against the free end of a bar.