Outline
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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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Outline

Outline

  • detailed operations

    • Model 04-02

    • Model 04-03

    • Model 04-04

  • general usage of ARENA


Electronic assembly test system

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


Models

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


Model 04 01

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


Outline

Model 04.02


New features of model 04 02 refinements of model 04 01

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


Schedule of the rework station

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


Failure of resource

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


Collect statistics

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


Statistics for racks and for sealers

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


Outline

Model 04.03


New features of model 04 03 refinements of model 04 02

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


Outline

Model 04.04


New features of model 04 04 refinements of model 04 03

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


Yield management

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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