Although it is assumed that increasing the institutionalization (or maturity) of project management in an organization leads to greater project success, the literature has diverse views. The purpose of this mixed methods study was to examine the correlation between project management maturity and IT/IS project outcomes. The sample consisted of two groups. The project manager group consisted of 47 IT/IS project managers, and the project sponsor group consisted of nine IT/IS project sponsors. The project sponsors participated in individual interviews and the project managers completed online surveys. Inferential statistical analysis (chi square and Fischer's Exact Test) was used to test the following possible correlations: * Cost maturity and cost performance * Time maturity and time performance • Scope maturity and scope performance * Cost/time maturity and efficiency * Scope maturity and effectiveness. None of these relationships was statistically significant on an overall basis, but one of the sub-tests for time maturity showed a significant relationship. A key limitation of the study is the small sample which may not be representative of the target population. There are also other variables not captured in this study which may impact success. However, this study adds a further note of caution with regard to the assumed benefits of project management maturity. [The dissertation citations contained here are published with the permission of ProQuest LLC. Further reproduction is prohibited without permission. Copies of dissertations may be obtained by Telephone (800) 1-800-521-0600. Web page: http://www.proquest.com/en-US/products/dissertations/individuals.shtml.]