I can
share this example of a publicly available resource that we have created
(..there is a much detailed and cleaner version internally).
If each of the functions have one level draft of what being ready for each level looks like, that will help in making it simpler for you to take the decision and also for them to know what they need to do.
This is also where KPIs play a role.
For e.g. If I have a Business Development Rep today and I say they are displaying the qualities that an AE in my team does, I should be able to mention those qualities to make it a fair decision.
You might also want to already start planning for this person's upskilling and not wait until the point they get a certain rating.
Another e.g. If there is someone on my team who has been doing good, qualifies parameters like experience range as well, you might want to start adding any trainings/workshops, etc. into their development planning.
I can share more with you to help understand this better if you might wish to connect directly some time. Texts may/may-not do justice 🙂