Abaqus - Mesh Convergence for assembly

Sir,

I am trying to perform mesh convergence on an assembly having a total of 8 parts. I am using ELSE as my field output to compare the results between two meshes. Now I have a query that which part I should target since I have 8 part mesh to refine. Is it ok if I keep some parts coarser and some finer?

please help
Thanks

Abaqus ​​​​​​​