@Keikee, You know this is a real good question you posted, and also a very important one and educational for many.
There are many pros or consumers out there who don't know or follow "Ergonomics" guidelines, which for a long time been the scientific way making any work environment much more safer and more comfortable to use and pro's been using that design and anthropometric data all the time as a reference.
Sure you can make a table and chair any height, you can hang cabinets, hood vents, microwaves as high or as low you like, or purchase them as deep as they make, etc the question is will that make a safe and comfortable environment for you or anyone? Most likely NOT if simple guidelines not taken into account.
So basically this "anthropometric" data been a guide for Architects, Contractors, Designers, etc for as long as they been around and these guidelines aim to make sure you end up with a good design and at the same time take into an account people's capabilities and limitations , and so it can fit into the workplace to the worker, rather than inconvenience for someone.
Here is an image that can be used as a guideline in your situation and is used by many professionals in the design industry and if you look at the measurements, they hood projection should be 17.5" max and stove projection is 27.5" and that's pretty much how 95% of all residential appliances made, anything after that you start getting into Pro series appliances intended for commercial use and prices start to hit the roof.
Good luck
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Anthropometric measurements on kitchen layout clearances- used by architects for space planning!
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