Evaluation of Vending Machine Locationwith Simulation

Evaluation of Vending Machine Locationwith Simulation

2006 . 11 . 15

IL HAN CHUNG

YU MEE LEEME KYUNG BAE

LUC

TeamMember

ContentsContents

I. Definition of Problem

II. The Current Location of Vending Machine

III. Data Collection

IV. Method for Solving Problem

V. Result of Simulation

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Definition of ProblemDefinition of Problem

Purpose

Reducing the Waiting Time of Customers

Reducing Routing Distance of Customers

Reducing of Shortage count of Raw material with Inspection/

Maintenance Interval

Range of Problem

Vending Machine in PNU

Consider Vending Machine for Beverage (with Can)

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The Current Location of Vending Machine The Current Location of Vending Machine

# of Building : 43# of Bending Machine : 54

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Data Collection (Continued) Data Collection (Continued)

Customers

Under-graduate/graduate students

Arrival time to PNU

Routing Path of Students

Ex) Sojourn time of Building 1

Ex) Next Moving Building to Current Building

Probability of using Vending Machine in current building

Service Time of Vending Machine

Probability of Leaving Queue of Vending Machine.

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Data Collection Data Collection

Service man

Routing Path for inspecting vending machine

Distance and time of each path

Inspection or maintenance time of vending machine

# of available service per maintenance

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The Method for Solving Problem The Method for Solving Problem

The Expression of Building

Consider Station Module

Routing Path of Students

Consider Route Module

Entity Type

Under-graduate Students : Maybe, Move to Several Building for Class

Graduate Students : Maybe, Sojourn to One Building

Resource

Beverage

Decide

Probability for Drinking Beverage in Current Building

Probability for Moving Current Building to Another Building

And So on…

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Result of Simulation Result of Simulation

We will consider several case as following

# of vending machine in each building

Routing Path of service man

Maintenance/Inspection Interval of service man

Statistics for Result

Waiting Time in Queue

Routing Distance Until Searching Vending Machine

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교수님 , 11 월 15 일 수업 후 교수님께서 주신 Tip 을 토대로 늦게까지 상의를 해 보았습니다 .

어제 너무 열심히 상의를 하느라 마감시간을 놓쳐 버렸습니다 .^^;

다음 프레젠테이션을 증거로 올리겠습니다 .

수정 프로젝트

ContentsContents

I. Definition of Problem

II. Data Collection

III. Simulation Approach

IV. Result of Simulation

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I. Definition of ProblemI. Definition of Problem

Introduction

Vending machines are convenient for customer to buy the favorite beverages.

However, sometimes, some favorite beverages are empty before service man’s inspection.

Objectives

Increasing the customer’s satisfaction.

Increasing the profit of vending machines.

Reducing of the shortage of beverage by inspection / maintenance.

Scope of problem

Vending machines for beverage can only.

Four vending machines at mechanical buildings in PNU have close relationship of

movement of customer.

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I. Definition of Problem (cont-)I. Definition of Problem (cont-)

The location of considered vending machines

The location of considered

vending machines.

Number considered vending

machines: 4

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I. Definition of Problem (cont-)I. Definition of Problem (cont-)

Flow chart of operations

Customer Drinking?Select

beverage?Go to Bld.?

Other Blds.

Leaving

Customer

Service man

Service man Vending machine Finish

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II. Data CollectionII. Data Collection

Customer

Under-graduate / Graduate / Passing

student

Arrival time of each type

Portion of drinking of each type

Portion of selecting favorite

beverage of each type

Portion of coming the building

Vending machine

Types of beverage

Number of each beverage type

Service time of vending machine

Service man

Inspection time of service man

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III. Simulation ApproachIII. Simulation Approach

Formulate problem

Collect data and define a model

Construct a computer program

and verify

Valid?

Make pilot runs

Design experiments

Valid?

Make production runs

Analyze output

Select the “best”

Yes

Yes

No

No

The steps in simulation study Validation method

Using statistical tools for

analyzing.

- No. of sold beverages.

- Waiting time of

customer.

- No. of customer in

queue.

- …

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IV. Result of SimulationIV. Result of Simulation

Alternatives

Number of position of each beverage in the vending machine.

Number of vending machine in each building.

Maintenance / inspection interval of service man.

Statistics

No. of sold beverages.

Waiting time of customer.

No. of customer in queue.