Organizational software processes improvement offers a key opportunity for organizations to be more efficient and effective. However, in most cases software process improvement initiatives in organizations become a path full of obstacles. As a consequence, organizations worldwide are adopting international standards and models in an effort to improve their software processes. Nevertheless, the difficulty of using multi-model improvement environments for the implementation of software processes improvements is well-known. In this context, effective integration of models and standards is a tool that enhances information sharing and communication. Integration can play a crucial role for the implementation of multi-model environments in order to be used as a reference model in software process improvements. This paper shows a methodology that enables organizations to establish a multi-model environment based on their business goals and on the results of a case study focused on implementing improvements in project management processes. Finally, results obtained after applying the methodology and future research line related to a platform for providing knowledge management and information sharing are included.