average handle time (AHT) Average handle time (AHT) is a call center metric for the average duration of one transaction, typically measured from the customer's initiation of the call and including any hold time, talk time and related tasks that follow the transaction. AHT is a prime factor when deciding call center staffing levels.
There are four castes in Hindu religion arranged in a hierarchy. The highest caste is Brahman, and they are the priest caste of Hinduism. After them are the Kshatria, who are the warrior castes. After them are the Vaishya caste , who are business people.
Shudra is caste but overtime they became divided. In the article you pointed to it stated Nair is a Sudra caste and it also stated they were warrior like. Other castes of South India that were Shudra castes are Kapus, Balija Naidus, Gavara Balijas, Gajula Balijas, Setti Balijas, Munuru Kapus, Reddy, Velamas, Kammas, Naiker, etc etc.