Environmental management systems in small and medium-sized
enterprises: an analysis and systematic review methods which are both quantitative and qualitative. With respect to the nature of this study it is classified as applied research, using bibliographic and field research as procedural techniques. The survey was conducted in two phases, the first of which researched the view of small businesses and the second, the view of big businesses. A T-test for independent samples was used to examine the hypothesis test. The small companies pointed out nine requirements with high levels of importance while the large companies pointed out only seven requirements. The results of both samples showed similar views, but with some differences for each set of companies surveyed.