EC-16-bigproject1012

EC-16-bigproject1012 - Chapters 16-18 Multiple-Goal Decision Analysis II Goals as constraints TPS example Constrained optimization Linear

Info iconThis preview shows pages 1–7. Sign up to view the full content.

View Full Document Right Arrow Icon
Chapters 16-18 Multiple-Goal Decision Analysis II Goals as constraints TPS example Constrained optimization Linear programming System Analysis Dealing with unquantifiable goals Preference table Screening matrix Presentation techniques for mixed criteria
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
TPS Decision Problem 5 Option A operating system: If one processor fails, system fails Processor reliability: 0.99/hour Mean time to repair: 30 min. System reliability for N processors: Rel (N) = (0.99) N System availability for N processors (prob. of failure per time period)(Avg. down time) Length of time period 1 – AV(N) = = 1 – (1-.99 N )(30Min)/(60min) = 1–½ (1-.99 N )
Background image of page 2
1 2 3 4 5 6 0.94 0.95 0.96 0.97 0.98 0.99 1.00 Rel, Av 400 800 1200 1600 2000 2400 E(N) trans/sec Number of processors, N E(N) DSC = (SC)(E(N))(Av(N)) Rel(N) Av(N) TPS Reliability, Availability, and Performance
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
1 2 3 4 5 6 400 800 1200 1600 2000 2400 Number of processors, N DSC(N) = E(N)*Av(N) 1426 796 1892 2196 2340 2328 TPS Delivered System Capability
Background image of page 4
Goals as Constraints 1. Can’t afford availability <.98 Choose N to maximize E(N) = 80N (11-N) subject to AV(N) > .98 2. Can’t afford delivered capacity < 1800 TR/sec Choose N to maximize AV(N) subject to E(N) > 1800 1. Comm. Line limits E(N) to < 1500 TR/sec; value of TR/sec = $500 (a); $1000(b)
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Optimal Solution for TV = 0.5E E=TV 1680 1620 1560 1500 1440 1380 2 530 4 610 N C 3 570 E < E(N) E < E(N) Av > 0.98 NV = 180 NV = 150 E < 1500 NV = 190 NV = 44 .5E – 40N – 450 = 200 NV =
Background image of page 6
Image of page 7
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 03/25/2008 for the course CSCI 510 taught by Professor Boehm,brown during the Fall '07 term at USC.

Page1 / 19

EC-16-bigproject1012 - Chapters 16-18 Multiple-Goal Decision Analysis II Goals as constraints TPS example Constrained optimization Linear

This preview shows document pages 1 - 7. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online