ITM 601 Lecture Notes - Lecture 9: Queueing Theory, Queue Management System, Accounts Receivable

• School: Ryerson University
• Department: Information Technology Management
• Course: ITM 601
• Professor: Selcuk Savas

Document Summary

Review: waiting lines, new material will be covered today and in the group project, first part of the project waiting lines. Waiting lines and queuing systems have a lot of psychology behind them as well. Can use either one of the formulas (mm1 or mm1 alternative form) Formulas are simple for the single server processes but very complex for multi server system. Little"s la(cid:449: significant formula but it is a generalized law, useful tool for process manager or somebody who tries to improve a process. Process flow unit: a patient, a dollar etc. Three aspects we are interested in: how much time does a unit spend within the process boundaries, how many customers do we see pass through the process. Process flow measures: flow time, w, flow rate. Inventory: this is the l, relationship bet(cid:449)een the abo(cid:448)e things is the little"s la(cid:449) L = lambda x w so w = 20/600.