Roles in a Project

A project may have various roles, but most LSS projects tend to have some roles in common that are either external or internal resources. External resources include an expert in LSS who is leading the project; common roles include a Green Belt, Black Belt, or Master Black Belt. These are external resources because they may not be required to have strong functional experience in the business area for the project, but they should have strong LSS experience. Internal resources include experts within the business area for the project; common roles include a Sponsor, Champion, Process Owner, and Subject Matter Experts (SMEs). In contrast to the external resources, these internal resources aren't necessarily required to have LSS experience, but they should have strong expertise in the business area for the project.
Related StatStuff Video: 
   -Section 1-Introduction, Lesson #8 - Key Roles in a Lean or Six Sigma Project