A Customer Enters a Business and Joins the One Line

Multiple Choice

A customer enters a business and joins the one line that snakes back and forth through the lobby in order to receive service. The initial part of the service is performed by one customer service representative, after which the customer enters a second, shorter line to complete the service before leaving the establishment. Which description of this waiting line system is appropriate?

A) single channel, single phase
B) single channel, multiple phase
C) multiple channel, single phase
D) multiple channel, multiple phase