Checking consistency between documents of requirements engineering phase

During the initial software specification phase, requirement document, use cases description and interface prototypes can be generated as a way to aid in the construction of system data. The consistency among these documents is a quality attribute which must be emphasized at this phase of the software development process. The QualiCES method is presented herein; it allows assessing the consistency among these software documents, and is supported by a checklist and by a consistency metrics developed to this end. As benefits, there is defect detection and a software quality warranty from the beginning of software development. The method was executed in a case study. Based on the results, the viability for applying the method can be verified, as well as the proposal innovation degree.