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Requirements traceability provides critical support throughout all phases of software engineering. Automated tracing based on information retrieval (IR) reduces the effort required to perform a manual trace. Unfortunately, IR-based trace recovery suffers from low precision due to polysemy, which refers to the coexistence of multiple meanings for a term appearing in different requirements. Latent semantic indexing (LSI) has been introduced as a method to tackle polysemy, as well as synonymy. However, little is known about the scope and significance of polysemous terms in requirements tracing. While quantifying the effect, we present a novel method based on artificial neural networks (ANN) to enhance the capability of automatically resolving polysemous terms. The core idea is to build an ANN model which leverages a term's highest-scoring coreferences in different requirements to learn whether this term has the …