page_title: Queuing Rule of Thumb
hierarchical_section_title: Queuing Rule of Thumb
caption_attribution_description: Pro23 DOE photo Ed Westcott 9-6-1944 Oak Ridge Tennessee
context_page_description: The Queuing Rule of Thumb is a mathematical formula, known as the queuing constraint equation when it is used to find an approximation of servers required to service a queue. The formula is written as an inequality relating the number of servers, total number of service requestors, service time, and the maximum time to finish the queue:
  Compared to standard queuing formulas, QROT is simple enough to compute the necessary number of servers without involving probability. It serves as a rough heuristic to address queue problems.
context_section_description: The Queuing Rule of Thumb is a mathematical formula, known as the queuing constraint equation when it is used to find an approximation of servers required to service a queue. The formula is written as an inequality relating the number of servers (s), total number of service requestors (N), service time (r), and the maximum time to finish the queue (T):
   
  Compared to standard queuing formulas, QROT is simple enough to compute the necessary number of servers without involving probability. It serves as a rough heuristic to address queue problems.
caption: People queuing
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