The course description from the SEI states:

This three-day course is the definitive introductory course about the CMMI for Services (CMMI-SVC) model. The course provides the knowledge you need to take your first steps with CMMI-SVC and is a prerequisite for any certification or subsequent course that calls for an Introduction to CMMI requirement.

CMMI-SVC is a comprehensive set of guidelines that helps organizations to establish and improve processes for delivering service. By adapting and extending proven standards and best practices to reflect the unique challenges faced in service industries, CMMI-SVC offers service providers a practical framework for achieving higher levels of service quality, controlling costs, improving schedule performance, and ensuring customer satisfaction.

The course is composed of exercises, discussion, and presentations with ample opportunity for participation. After attending the course, you will understand the concepts and issues related to CMMI-SVC.

Who should attend?

• Service providers and customers
• Process improvement practitioners and champions
• Appraisal team members
• Instructors and lead appraisers
• Professionals interested in service management concepts

What will you learn?

This course will help participants to:

• determine whether CMMI-SVC applies to your business context
• learn effective practices for defining, establishing, and managing service.
• sustain your improvement
• prepare for next steps, such as an appraisal or certification

SEI-Certified SCAMPI Lead Appraisers for Services can use the SCAMPI appraisal materials, including appraisal team training materials, only to train appraisal teams and to lead appraisals on behalf of an SEI CMMI for Services Partner. SEI-Certified SCAMPI Lead Appraisers cannot use the materials to conduct appraisals independently or on behalf of organizations that are not licensed by CMU/SEI to conduct CMMI for Services appraisals. SEI-Authorized SCAMPI Lead Appraisers using CMMI for Services are not authorized to complete a SCAMPI A appraisal until 6 months after the release of the CMMI-Services Model.

As for the Services Supplement offering the SEI states:

This one-day course introduces service providers, appraisal team members, and process group members to CMMI® fundamental concepts related to service delivery. The CMMI for Services (CMMI-SVC) model defines effective practices that ensure quality services are delivered to customers and end users. Some types of services that would benefit from using CMMI-SVC include operations, logistics, maintenance, IT, and many other services in other government and industry.

SEI-Certified SCAMPI High Maturity Lead Appraisers (SCAMPI HM LAs) lead trained teams of professionals in the appraisal[...]  determine an organization’s process capability and/or maturity level.

Before [...] become[ing] a SCAMPI HM LA, you must

• Be a current SEI-Authorized SCAMPI Lead Appraiser in good standing
• Present evidence of having led at least two CMMI SCAMPI A Appraisals. (Note: CMM appraisal experience will not be accepted to this requirement.)
• Present successful completion of at least one course relevant to CMMI high maturity concepts and practices, (e.g., High Maturity with Statistics, Statistical Measurement, and Statistical Process Control). Qualifying courses must have been completed within the last five years.
• Show experience working in a high maturity process improvement environment in one of the following three areas:
  • Building/implementing HM practices or participation on at least one CMMI SCAMPI A Capability Level/Maturity Level 4 and/or 5 Appraisal as a team member or mini-team member
  • Developing/facilitating HM training
  • Statistical/quantitative management or modeling & simulation experience in support of managing/building products.