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.
Select a black belt (or a green belt for a simple project) to lead the project team. Remove any political barriers or resource constraints to their Six Sigma project. Provide a communication link between project team(s) and top management. Help team members manage their resources and stay within the budget.