WaitingLineManagement

WaitingLineManagement - 1 HKUST – S. M. Ng Waiting Line...

Info iconThis preview shows pages 1–16. Sign up to view the full content.

View Full Document Right Arrow Icon

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

View Full DocumentRight Arrow Icon

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

View Full DocumentRight Arrow Icon

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

View Full DocumentRight Arrow Icon

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

View Full DocumentRight Arrow Icon

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

View Full DocumentRight Arrow Icon

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

View Full DocumentRight Arrow Icon

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

View Full DocumentRight Arrow Icon

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

View Full DocumentRight Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: 1 HKUST – S. M. Ng Waiting Line Management-Response Time Management 2 HKUST – S. M. Ng Explain the causes of waiting or idleness that increase overall system cost [4] (R) Model a system and evaluate its key performance measures using simple basic tools [4] (R) Apply the waiting line model to design better service systems that improve system performance and achieve overall lower system cost [4, 1, 3] (R, MI, CT) Explain and identify approaches for managing customer expectation and improving customer satisfaction [4, 1, 3] (MI, CT) OBJECTIVES 3 HKUST – S. M. Ng Waiting is Part of Everyone’s Life 4 HKUST – S. M. Ng Why do queues exist? Customer Arrivals Servers Waiting Line Servicing System Exit Queue or Uncertainty :-Time between arrivals of customers- Time to serve a customer 5 HKUST – S. M. Ng Queuing System structures Stage 1 Servers Waiting Line Population Source Stage 2 Stage 3 Multi-stage Single line Exit Multi-channel / servers 6 HKUST – S. M. Ng Examples of queuing system Structures Single Channel Multichannel Single stage Multi-stage One-person barber shop Car wash Hospital admissions Queues in a bank Channel Stage 7 HKUST – S. M. Ng Factors affecting the queuing system Servers Waiting Line Servicing System Queue or Population Source 8 HKUST – S. M. Ng Customer/Population Sources (Assumptions) Population Source Finite Infinite Example: Number of machines needing repair when a company only has three machines. Example: The number of people who could wait in a line for gasoline. 9 HKUST – S. M. Ng Factors affecting the queuing system Servers Waiting Line Servicing System Queue or Population Source Customer arrival pattern: We will assume a Poisson arrival Pattern (M), with arrival rate  10 HKUST – S. M. Ng Factors affecting the queuing system Servers Waiting Line Servicing System Queue or Population Source Queuing discipline: FCFS – first come first serve Priority queue LCFS – last come first serve 11 HKUST – S. M. Ng Queue Configurations Multiple Queue Single Queue Take a Number Enter 3 4 8 2 6 10 12 11 5 7 9 12 HKUST – S. M. Ng Factors affecting the queuing system Servers Waiting Line Servicing System Queue or Population Source Number of servers 13 HKUST – S. M. Ng Factors affecting the queuing system Servers Waiting Line Servicing System Queue or Population Source Service time distribution and service rate (μ) . 14 HKUST – S. M. Ng Service Pattern Service Pattern Constant service time Variable service time Assume exponential Distribution (M) Example: Items coming down an automated assembly line. Example: People spending time shopping. 15 HKUST – S. M. Ng Congestion vs. System Utilization 0 1.0 100 10 8 6 4 2 0 For the M/M/1 model, avg....
View Full Document

This note was uploaded on 09/21/2011 for the course COMP 4631 taught by Professor Ding during the Fall '11 term at HKUST.

Page1 / 46

WaitingLineManagement - 1 HKUST – S. M. Ng Waiting Line...

This preview shows document pages 1 - 16. Sign up to view the full document.

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