Substantial recent growth in online graduate programs has garnered the attention of the higher education community. Given their limited resources and capability, institutions seeking to scale their online graduate programs need to consider whether to insource or outsource this initiative. The purpose of this study was to identify the knowledge and institutional influences affecting the decision-making process of Online Program Leaders (OPLs) in the selection of a sourcing strategy for scaling online graduate programs. The study participants were institutional leaders at various private non-profit master's and doctoral universities with decision-making power and responsibility for source selection and implementation. Data was collected through surveys, interviews, and document analysis. The results and findings demonstrated that OPL knowledge of resources, structure, and capability was highly influential in source selection. The prevailing negative perception of online learning among institutional members, existing policies and procedures such as new program approval process and graduate program budget models, and the lack of adequate communication were identified as barriers in source selection and implementation. The study provides general recommendations for institutions seeking to scale their online graduate programs. They include ensuring OPLs possess and maintain a high level of knowledge of resources, capability, and structure; establishing a strategic vision for scaling; and leveraging institutional culture to overcome scaling obstacles. [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.bibliotheek.ehb.be/en-US/products/dissertations/individuals.shtml.]