A litho hotspot repair hints requires the specifications of how layout edges should be modified. Identifying how layout edges not directly touching the hotspot region is challenging to encode in a rule set. We propose an approach using models called Partition Response Surface Models (pRSM) to estimate the contours changes due to design layout modifications. In this paper we present details of litho hotspot repair hint engine which uses the pRSM models to compute the shape changes amount to resolve a litho hotspot and which can accept constraints from both design considerations or design rule considerations.