Initially, these companies raised no restriction on the adoption of one or other standard because the certification was not a short-term goal for them. Thus, given that the main interest of the companies was to improve internally, we should propose a set of best practices to be incorporated into their projects. From our experience in implementing process improvement programs in small and medium enterprises and given the nature of these organizations , we suggested to adopt the ISO/IEC 29110 international standard for software process improvement, Because it is specific for VSEs and completely fitted their needs . Moreover, if they wish to opt for the certification in the future, they would be already aligned with a recognized international standard.