  Complex decision-making is a prominent aspect of Requirements Engineering.
This work presents the Bayesian network Requisites that predicts whether the
requirements specification documents have to be revised. We show how to
validate Requisites by means of metrics obtained from a large complex software
project. Besides, this Bayesian network has been integrated into a software
tool by defining a communication interface inside a multilayer architecture to
add this a new decision making functionality. It provides requirements
engineers a way of exploring the software requirement specification by
combining requirement metrics and the probability values estimated by the
Bayesian network.
