This International Standards provides guidance for the use of the new series of International Standards
named Software product Quality Requirements and Evaluation (SQuaRE). The purpose of this Guide is to provide a general overview of SQuaRE contents, common reference models and definitions, as well as the relationship among the documents, allowing users of the Guide a good understanding of those series of standards, according to their purpose of use. This document contains an explanation of the transition process
between the old ISO/IEC 9126 and the 14598 series and SQuaRE and also presents information on how to use the ISO/IEC 9126 and 14598 series in their previous form.
SQuaRE series of standards is intended for, but not limited to, developers, acquirers and independent
evaluators of software products, particularly those responsible for defining software quality requirements and for software product evaluation. It is recommended that users of the SQuaRE as well as ISO/IEC 14598 and 9126 series of standards also use this International Standard as a guide to execute their tasks.