Langerhans' cell histiocytosis can manifest as three distinct clinicopathologic entities: acute disseminated Langerhans' histiocytosis (previously known as Letterer-Siwe disease), unifocal Langerhans' cell histiocytosis (previously known as eosinophilic granuloma).
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.
Average Hold Time (AHT) The average hold time is the average time taken for an operator to answer a call or the time a customer waits in the queue before being answered. Handling time is the amount of time between when the system puts the customer on hold until the moment an agent becomes available (or the caller hangs up).