Check fluid levels every morning, top up fluid levels, change the oil and spark plugs, check over looms for breaks or heat damage, replace pressure transducers and thermocouples as they stop functioning. Change emissions filters. Fit new test components, change clutches, check cambelt tensions or replace, listen for knock or strange noises that speakers can't diagnose. Diagnose other problems with the engine and fix straight away. Install the engine, dismount the engine, I have 4 computer screens running and monitoring and recording all testing, Plus some of the testing has to be done manually because the computer won't put enough fuel in, won't put enough spark in, plus because they are prototype development engines, they are not going to want secret data out for other car manufacturers to be able to intercept and steal their ideas. We're not even allowed to take photos without prior permission.
Plus the most important thing, interacting with workmates properly, something a camera and microphone can never truly replace.