Problem of size optimization's desvar

I want to ask at this time I do the size optimization

 

but at the shell property, I defined the T(thickness)=0.8mm

 

 

and at the size panel I need to defined the initial value, lower bound and upper bound

I want to ask at here initial value and property thickness are different

so which is the original thickness of my model?

and if my lower bound is 0.1, so it means my model's thickness the lowest is 0.1 mm?  

 

<?xml version="1.0" encoding="UTF-8"?>