Software-as-a-Service (SaaS) is becoming a very powerful strategy for develop more flexible software solutions and to shorten their time-to-market. Typical SaaS providers are SMEs, which have several limitations to keep competitive. The essential motivation of this work is to provide better means to allow groups of SaaS providers (a Virtual Organization - VO) to work collaboratively towards more valuable SaaS solutions that are composed of individual and shared SaaS providers’ services. However, working collaboratively requires handling plenty of issues in many dimensions. This work provides a comprehensive and consolidated list of reference processes that SaaS providers should deal with along the (VO) life cycle of a collaboration. This helps them to better plan and manages their activities and involved assets in a collaboration.