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Outline

Outline. detailed operations Model 04-02 Model 04-03 Model 04-04 general usage of ARENA. Part A. Process A. EXPO(5). Tria(1,4,8). Rework. 9%. Part B. 91%. Process B. Batches of 4 EXPO(30). Shipped. Tria(3,5,10). Electronic Assembly/Test System. Scrapped.

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Outline

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  1. Outline • detailed operations • Model 04-02 • Model 04-03 • Model 04-04 • general usage of ARENA

  2. Part A Process A EXPO(5) Tria(1,4,8) Rework 9% Part B 91% Process B Batches of 4 EXPO(30) Shipped Tria(3,5,10) 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

  3. Models • Model 4.1: basic • Model 4.2: resource schedule, resource failure, frequency – time persistence statistics • Model 4.3: changing animation queue, changing entity picture, adding resource picture, adding variables and plots • Model 4.4: using modules in Advanced Transfer

  4. 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

  5. Model 04.02

  6. New Features of Model 04-02: Refinements of Model 04-01 • run length 10 days, 16 hours per day • two 8 hr shifts / day • 1 re-worker in the first shift • 2 re-workers in the second shift • sealer may break down • life time expo(120) • repair time expo(4) • statistics of the status of sealer: on and off • statistics of the rework queue (distribution of # of racks) • each rack possible to hold 10 items

  7. Schedule of the Rework Station • define schedule of re-workers (Schedule module) • associate the schedule with the (resource of the) re-work station • option on resource when a service is interrupted: ignore, wait, preempt • modify the # of hours per day to suit the schedule

  8. Failure of Resource • define a failure (Failuremodule in Advanced Processes) • associate the failure with a resource • the treatment of incomplete work at a failure • same as schedule: ignore, wait, and preempt

  9. Collect Statistics • to get time-in-system statistics of a type of entities (customer-average statistics) • use Record module • record exit time - creation time • compile statistics • to get time-persistent statisticsof a collection of values of variables or a collection of states of resources • use Statisticsmodule (in Advance Process Template) • may need to self-define categories

  10. Statistics for Racks and for Sealers • time-persistent statistics –Statistics module • statistics on sealer status • fraction of idle, failed, and busy time of sealer • statistics on number of racks needed • fractions of time for different number of racks used

  11. Model 04.03

  12. New Features of Model 04-03: Refinements of Model 04-02 • animation of queues • length and points of queues • changing entity pictures • creating new one: copy, edit, and assign entity picture • adding resource pictures • creating resource picture from animation tool bar • adding variable plots

  13. Model 04.04

  14. New Features of Model 04-04: Refinements of Model 04-03 • saving connection links by station and route modules • stations: module for program and icon for animation • route: module for program and icon for animation • changing an entity picture

  15. Yield Management • C = capacity of plane, 100 • Q = # of reservations allowed • X = actual # of passengers appear • ~ Binomial (Q, 0.95) • V= net profit • = 1600X – 40000 – 180 min(X, C)- 2500 max(X-C, 0) • result: Q* = 106

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