1 / 12

Outline

Outline. Chapter 3: Guided Tour Through Arena Chapter 4: Modeling Basic Operations and Inputs. Chapter 3 Guided Tour Through Arena. a drill press. Model 03-01. a drill press processing one type of product interarrival times ~ i.i.d. exp(5) service times ~ i.i.d. triangular (1,3,6)

mindy
Télécharger la présentation

Outline

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Outline • Chapter 3: Guided Tour Through Arena • Chapter 4: Modeling Basic Operations and Inputs

  2. Chapter 3 Guided Tour Through Arena

  3. a drill press Model 03-01 • a drill press processing one type of product • interarrival times ~ i.i.d. exp(5) • service times ~ i.i.d. triangular (1,3,6) • all random quantities are independent one type of parts; parts come in and are processed one by one

  4. Model 03-02 and Model 03-03 • fundamental questions • specialized or generalized workers? • effect of variability of service times? • applicant arrivals: interarrival times ~ i.i.d. exp(1.25) • four workers: all service times ~ exp(1) • Model 03-02: sequential servers • Alfie checks credit; Betty prepares covenant; Chuck prices loan; Doris disburses funds • Model 03-03: parallel servers • Each employee can do any tasks

  5. exponential service times constant service times specialized (and sequential) servers Model 03-02 Model 03-04 generalized (and parallel) servers Model 03-03 Model 03-05 Remarks for Models 03-02 to Model 03-05 • Expression Builder & the online book (Arena Variables Guide.pdf)

  6. Insights from Simulation Results • generalized (parallel) servers being better • less WIP; shorter total time in system; shorter total waiting time; higher throughput • less variable service times being better • less WIP; shorter total time in system; shorter total waiting time; higher throughput • formal proof after numerical evidence

  7. Comments on Menus and Toolbars • many • menus: Edit, View, Tools, Arrange, Object, Run, Window, Help • toolbar: Standard, Draw, Animate, Integration, View, Arrange, Run Interaction, Record Macro, AVI Capture, Animate Transfer • different levels of help • specific features of Running • no animation: fast forward or batch run • compiling by clicking F4 • debugging

  8. Chapter 4 Modeling Basic Operations & Inputs

  9. A Sequence of Related Models • Model 4-1: a sealed electronic assembly and test system • more features, • Model 4-2: additional features in scheduling, failure, and states of resources • Model 4-3: more advanced animation • Model 4-4: advanced features in moving – stations, routes, and animation

  10. Part A Process A EXPO(5) Tria(1,4,8) Rework 9% 91% Process B Shipped Tria(3,5,10) Part B Batches of 4 EXPO(30), de-batch on arrival An Electronic Assembly/Test System Scrapped Part A TRIA(1,3,4) Part B WEIB (2.5, 5.3) 20% 80% EXPO(45) Salvaged & Shipped Sealer

  11. Part A Scrapped Part A TRIA(1,3,4) Part B WEIB (2.5, 5.3) Process A 20% EXPO(5) Tria(1,4,8) 80% Rework EXPO(45) Salvaged & Shipped Sealer 9% 91% Process B Shipped Tria(3,5,10) processes Part B create batches of 4 entities & de-batch later chance create entities statistics Batches of 4 EXPO(30), de-batch on arrival time varying capacity unreliable system type-dependent service times An Electronic Assembly/Test System to determine the number of racks

  12. Model 04-01 • ignore details • the 2-minute traveling times • the working hours of stations • schedule of the re-workers • failure of the sealer • the number of racks used

More Related