This paper describes the extension of a systematic review on organizational motivations for adopting CMMI-based Software Process Improvement (SPI). CMMI (Capability Maturity Model Integration) is a long- standing, influential and often-studied approach to SPI. The systematic review proceeds by discovering, evaluating and interpreting all available research data relating to this subject. This study added one extra search engine to the original work and extended the period in five years, from 2005 to 2010. Among other things, this study concludes that the motivations changed from being related to software quality to focusing on attending customers’ requirements and satisfaction, as well to conquer external validation.