Such questions can be found on the Internet. I'm impressed.
Give some advice, for reference only.
You can do a set of data analysis, current headcount and performance. Plans for the next year, two years, three years and five years.
Then there is the action of all staff, which allows the managers of each group to declare what kind of scale each group will be in the future.
If one person can't do it well, it will be easier for everyone to move.