Bulbophyllum Phalaenopsis - Factual & scientific signs of plant maturity

[The Ozzie Orchid Empress]

Hi guys,
New to the site but not new to orchids.

My question relates to my bulbophyllum phalaenopsis. I have done plenty of digging and i have also read other threads on the site that was tagged as bulbophyllum phalaenopsis, yet i have not encountered a factual, or more precise answer if you may, that could enable me in assessing the maturity of my bulbophyllum phalaenopsis.

I have seen many saying you must have a leaf that measures at least up to 24''.
Others saying the bulb must be x amount of size.
Some other comments say it depends on your growing conditions, and that is all great, but it is too vague for someone that understands facts.

I get that there are variables, and that the growth conditions as well as other external factors always come into play when anyone grows anything, but is there any chance that someone can offer me some factual, scientific, and factual evidence and/or signs to check for, or any tips, on how it is i can assess my plants maturity please?

I have attached pictures for reference.

Thank you kindly in advance.