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To: cs551@merlot.usc.edu
Subject: Re: average service time
Date: Sun, 21 Sep 2008 21:03:27 -0700
From: Bill Cheng <william@bourbon.usc.edu>

Someone wrote:

  > If there are 3 customers and u press cntrl C after 2 customers arrived.
  > thats is we have 2 custtomers serviced and 3 arrived.
  > 
  >  should we divide by 3 or 2 ?

If you are the bank manager and you are trying to find out
what's the average time a customer spent at a teller, what
would be the right thing to do?
--
Bill Cheng // bill.cheng@usc.edu <URL:http://merlot.usc.edu/william/usc/>



  > Someone wrote:
  > 
  >   > Is Avg Service time = total serive time by S1/customers in
  >   > s1 +total service time in S2/ customers in s2
  >   > 
  >   > or = (total service time by s1 + s2) / total customers arrived ?
  > 
  > If there are 3 customers, customer 1's service time is
  > 2.5 seconds, customer 2's service time is 3.3 seconds,
  > customer 3's service time is 1.7 second, the average
  > service time is (2.5+3.3+1.7)/3.
  > --
  > Bill Cheng // bill.cheng@usc.edu <URL:http://merlot.usc.edu/william/usc/>