
Concept explainers
Case summary:
TG from country S is the third largest telecom company. Its service offering includes landline, cell phone, broadband and TV services. TG has 256 million customers worldwide, the majority of which are cell phone users.
T’s mobile communication subsidiary M has 16 million customers and 4000 employees. M implement Six Sigma and Lean philosophy in 2002, and up till 2011 it has completed more than 200 projects focusing on cost reduction, service level increases, process reengineering, quality assurance and productivity improvement. This resulted in cumulative savings of $245 million. Projects are now executed with focus on three key initiatives – improvement community, workshops, and inheritance stage.
Via this process, M has trained several Champions, Black Belts and Green Belts. The improvement community consists of Black and Green Belts that conduct training on quality issues and mentor other Black and Green Belts in the usage of quality tools. The improvement community also organizes workshops for new project development.
After a team completes the DMAIC stage, the quality team evaluates team performance, followed by an inheritance period of one year. A project heir is assigned – the best performing Green Belt from the team. The heir is responsible for “improve” and “control” sections of DMAIC.
To determine: Another global company that has successfully implemented Six Sigma and discuss its experiences.

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Chapter 2 Solutions
Operations and Supply Chain Management 9th edition
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