class11 - Sheet1 Page 1 calculate new response time real...

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Unformatted text preview: Sheet1 Page 1 calculate new response time real example-customers arive at 30/sec-each customer takes 0.02 seconds to be serviced what is the utilization? lambda=30 mew=1/(.02)=50 new mew = 100 U=30/100 response time = 1/(mew-lambda) = 1/70 = .014 look at the P_k and the Nbar P_0 = 1 - 30/100 = 0.7 P_1 =.7*30/100 = .21 graph both fyi Nbar= E(n) Nbar = U/(1-U) =.3/.7 = .428 for old system Response time = .05 = mew + wait = .02 + 1/mew*Nbar = .02 +.03 for new system response time = 0.014 = mew + wait = 0.01 + 1/mew*Nbar = 0.01 + 1/100*.42 = 0.01 + .00428 homework 4 uniform arival uniform service rate inf queue lambda = 50 jobs/S S_d = 0.01 S Calculate U,P_0,P_1,P_2, Nbar, X, R U 50% P0 0.5 P1 0.25 P2 0.125 Nbar 1.0 X 50 R 0.01 part 2 Sheet1 Page 2 lambda = 75 jobs/s S_d = .01 S Calculate U,P_0,P_1,P_2, Nbar, X, R U 75% P0 0.250 P1 0.187 P2 0.141 Nbar 3 X 75 R .04 Part 3 lambda = 95 job/s S_d = .01 Calculate U, P_0, P_1, P_2, Nbar, X, R U 95% P0 0.05 P1 0.0475 P2 0.0451 Nbar 19 X 95 R .2 COMPLICATE MATTERS...
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This note was uploaded on 05/02/2008 for the course ECE 460 taught by Professor Michel during the Spring '08 term at UMass Dartmouth.

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class11 - Sheet1 Page 1 calculate new response time real...

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