1. A method, comprising: providing a pre-optical proximity correction (OPC) layout of at least a portion of at least one reticle, said pre-OPC layout comprising a test cell comprising a first test cell area and a second test cell area, said first test cell area comprising a plurality of first target features having a first pitch, said second test cell area comprising a plurality of second target features having a second pitch; forming a post-OPC layout of said at least a portion of said at least one reticle on the basis of said pre-OPC layout, the formation of said post-OPC layout comprising: performing a rule-based OPC process wherein a plurality of first reticle features for said first test cell area are provided on the basis of said plurality of first target features; and performing a model-based OPC process wherein a plurality of second reticle features for said second test cell area are provided on the basis of said plurality of second target features.