The Public Switched Telephone Network - The public switched telephone network (PSTN) is the international network of circuit-switched telephones. Learn more about PSTN at HowStuffWorks. x
Black Belt Certification. The IASSC Certified Lean Six Sigma Black Belt (ICBB) is a professional who is well versed in the Lean Six Sigma Methodology, who leads improvement projects, typically in a full-time role. A Lean Six Sigma Black Belt possesses a thorough understanding of all aspects within the phases of D-M-A-I-C.
Acuity Instituteâs Lean Six Sigma Black Belt Certification course is one the most comprehensive in the world. Upon completion, students will be able to move seamlessly from the training environment into the workplace and begin leading Lean Six Sigma projects.