Hi Sandeep, There are several ways in which we can incorporate Six Sigma in Telecom infra. For Example: 1.Improving the process of "Service Provisioning". Example : When corporate customer moves from their "Frame Relay or ATM" towards "IP VPN - MPLS", a lot of variance is seen in provisioning of service. Six Sigma DMAIC approach can be used. 2. Improvising the process in "Service Feasibility" 3. As a part of Continous Service Improvement we can opt for Six Sigma . Example: Services like DEL, ADSL are quite unpredictable over Wimax. This can be improvised. 4. In Customer Support , mostly ADSL (home connection) requires assistance over the phone (L1 or L2) . Six Sigma can be applied to it. These are few in Telecom sector . Thanks Safdar Hussain