** :- "DI is measure of how many times faster as compared to prescribed time for
delivery"
##: - Sigma measures how many service requests delivered beyond
prescribed time.
2.1) Sigma 0 = 5 lakh out of 1 million beyond prescribed
time.
2.2) Sigma 1 = 3 lakh out of 1 million beyond prescribed
time.
2.3) Sigma 2 = 1.5 lakh out of 1 million beyond prescribed
time.
2.4) Sigma 3 = 66000 out of 1 million beyond prescribed
time.
2.5) Sigma 4 = 22000 out of 1 million beyond prescribed
time.
2.6) Sigma 5 = 6000 out of 1 million beyond prescribed
time.
2.7) Sigma 6 = 1350 out of 1 million beyond prescribed
time.
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