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.
How long does it take to get a Six Sigma Black Belt? The Six Sigma Black Belt certification generally takes between 1 to 3 months to study for and complete, depending on the organization you get your certification through. The average completion time for the Six Sigma Black Belt through the Management and Strategy Institute is 30 days. The Study material included with the Black Belt certification is specifically designed to prepare you for the certification exam.