Determining dynamic approval levels from Z table

Hi experts ,

Considering application for ESS leave approval , i am using a custom table to store all the approvers .

The approval levels are not fixed ( dynamic ) , which i have to determine at runtime from the z table .

The Approval level entries in the Z table is not fixed , that can be extended or reduced from one level to N levels and vice versa.

So i need some suggestions for this requirement from you experts .

Regards

Wasim