Texeira Fernandes Justino, Maria Do RosárioTexeira Quirós, JoaquínAlmaça, José2019-02-082019-02-0820101697-9818http://hdl.handle.net/10400.21/9467Artigo em revista científica internacional com arbitragem científicaImproving quality is one of the tools that companies have to improve or maintain their market position. However, despite the large number of papers published, a clear conclusion of the impact of ISO9000 standards on business results has yet to be reached, given there are many conflicting opinions. Thus, the aim of this paper is to review the literature on some of the many published research papers, seeking some way to analyse the existing relationship between the implementation of systems of quality management, ISO9000 certification, quality costs, results, and their effect on company performance.engTQMISO9000QualityPerformancejournal articlehttp://dx.doi.org/10.3926/ic.207