Product derivation in software product line engineering starts with selection of variable features manifested in a feature model. Selection of variable features for a particular product, however, is not made arbitrarily. There are various factors affecting feature selection. In this paper, we propose a method for deriving an optimal product feature configuration that maximizes required quality attributes. Specifically, this paper describes a technique for deriving an optimal solution by mapping the problem of deriving an optimal product feature configuration to binary integer programming, which is an optimization technique.