How Time Zone Difference Helps Indian BPO Industry?

The timezone difference of US and Other developed countries and India is approximately 10-12 hours. This is of great advantage in BPO operations. This is because of the reduced turnaround time.
Turnaround time is the total time taken between the submission of a program for execution and the return of the complete output to the customer. In developed countries the processing services are perfomed at night and so India is able to provide round the clock services. This way India is able to leverage the Time Zone difference.