Uncertainties of Environment's Parameters Measurements as Tolls of the Measurements Quality Improvement

ISO 9001 and ISO 14001 certifications has grown spectacularly all over the world in recent years, even though a certain saturation has been detected in some countries. On the one hand this paper aims to analyze the world wide diffusion process of these two standards, using data provided by the ISO itself by a diffusion model based on the logistic curve, that fits quite well to explain the growth of certifications. On the other hand, the paper aims to analyze the case of Spain, one of the countries with a bigger ISO 9001 and ISO 14001 certification's intensity impact, as well as the case of Serbia, a country where ISO 9001 certification is growing more and more.