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.
Of the 1,575 completed investigations, 69.5% were timely. VA's average time for completing an investigation was 179 days. Of the agencies completing 25 or more investigations, the Tennessee Valley Authority had the lowest average of 100 days. VA's average processing time for all complaint closures decreased from 366 days in FY 2008 to 311 days in FY 2009. The government-wide average was 344 days.