team2_product requirements document 11.22.2011

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GE401- Innovative Product Design & Development I

Product Requirements Document11/22/2011

VFood

Team 2Seydi Afşin Ünlü Emirhan Akdemir

Cansu AcarMelodi Türkili Onur Şentüre

Engin İyidoğan

Version: 1.0



1

Table of Contents

Introduction ............................................................ ………. 2Functions of the Product ............................................................ ………. 2

Serving Capacity ............................................................ ………. 2Prevention Disturbance To Environment ……………………. 3Simple Working Principle and Durability ……………………. 3Practical Use ............................................................ ………. 4Security ............................................................ ………. 4

Interfaces of the Product ............................................................ ………. 4Payment System ............................................................ ………. 4LCD Screen ............................................................ ………. 4Keypad for Ingredient Selection …………………………… 5Power Supply ............................................................ ………. 5

Technical Specifications ............................................................ ………. 5Cost and Standards ............................................................ ………. 6Quality Function Deployment ............................................................ 7

Data Gathering ............................................................ ………. 7Customer Importance Ratings …………………………………… 9Technical Properties ………………………………………. 10

Conclusion ............................................................ ………………...... 14

Appendix ............................................................ ………………...... 15References ............................................................ ………………...... 15



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IntroductionProduct requirements document aims to explain functions and specifications of our product.

Before we worked on this documentation, we had made a market survey about similar products

and systems which will be used in our project. First of all, we determined functions of productand expectations of customer. After defining functions, we began to work on design of

MacQuick which is also mentioned as “Macaroni Vending Machine” in our previous reports.

Design specifications are written under both “interface of the product” and “technical

specifications” parts. Interface of product mainly includes buttons, display, paying system and

external view. On the other hand, technical specifications of vending machine consist of

electrical and physical properties of product, such as height and weight of system. We try to

make a prediction for cost of our vending machine and explain standards of product. Finally, we

mentioned about the quality function deployment to integrate user demands into quality design

process in order to obtain customer focused products.

Functions of the ProductOur product, MacQuick, basically is an auto-mat which offers a bowl of cold-served macaroni

with personally chosen ingredients in it. Since it is planned to achieve to deliver the food within

20 seconds, it is a quick way to have your breakfast, lunch or even dinner. Since MacQuick will

serve in various places to every people, it has to be easy-to-use and it cannot create a disturbance

to environment as smell or noise. It is also significant that our vending machine works for 24

hours without any intervention. To achieve these purposes, the solutions and precautions that the

engineers of the company proposed are listed as follows.

Serving Capacity

MacQuick will have a capacity to serve up to 80 bowls of macaroni which is the number

calculated as the maximum cooked macaroni we can store in MacQuick. It is also considered that

how many macaroni may MacQuick may sell in a day and determined the sizes of our product

accordingly which are given under “Technical Specifications” topic.



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Prevention Disturbance to Environment

MacQuick may cause some disturbances to environment such as noise, smell and visual

discomfort if the necessary precautions are not taken.

MacQuick has a refrigeration system to keep the ingredients under a specific temperature for

prevention of rotten food. The refrigeration system contains a small motor which may cause an

irritant noise. We plan to reduce this noise to a very low level to prevent this type of disturbance.

Since we are storing and vending different kinds of food and since foods go bad after some time

it may cause bad smell which is an undesired situation. To prevent foods in the MacQuick to go

bad, the temperature will be kept around 15 degree Celsius with our refrigeration system. And

since the stored ingredients in MacQuick will be replaced daily, any bad smell of rotten food willbe prevented completely.

What about visual disturbance? The user is expected to take a plastic bowl and place it in the

output slot and the macaroni will be dropped into it. However, if the user does not place the bowl

into the output slot, the macaroni may fall on the floor which is definitely a cause of visual

discomfort. We plan to design a precautions system that does not allow to drop any macaroni

unless the sensors do not see the empty bowl in the output slot.

Simple Working Principle and Durability

MacQuick has a quite simple working principle. Placing the ingredients into slots and plugging

the machine in, is enough to make MacQuick fully functional and ready to serve. So it does not

require any knowledge, skills or extra effort to prepare MacQuick for a day to serve.

Sometimes there may be power cuts and this may cause malfunction of vending machines if it is

in process of vending. However, necessary precautions are taken this can be prevented.

MacQuick avoids any malfunction caused by power cuts with the help of “Uninterpretable

Power Supply ” (UPS). UPSs supply power to the MacQuick when the power is cut and keeps it

functioning.



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Practical Use

Since MacQuick is a vending machine and will serve to any people, it is essential to make the

use of MacQuick as practical and simple as possible. In the process of vending, the customer will

use the bill validator and keypad. And all the process will be displayed in the LCD. The details

of these components are given under “Interfaces of the Product” topic. The whole interface is

designed to be simple and easy to use as stated under that topic.

Security

Since an interruption to the internal structure of MacQuick is an undesired situation; there will be

a padlock to prevent this situation. MacQuick will have a steel case which is also makes breaking

in even harder. There is also another security system of the bill validating system to keep the

paid money safe.

Interfaces of the ProductUser interface of the product basically consist of three parts: Payment system, LCD screen, 4x3

keypad a power supply

Payment System

In payment system of MacQuick, bill validator reads money and sends the amount of money as

information to microprocessor. Paying system will detect dollar ($). There will not be payment

back to user.

LCD Screen

Total credit of the customer, problem messages, informing messages such as the the message

shown when the macaroni is ready, are shown through LCD screen.

Figure 1: Sample LCD Display



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Keypad for Ingredient Selection

There exists a keypad like the one given in figure 2 in order to enable the customer choose the

ingredients that they will be added into their macaroni. If an ingredient button pressed

inadvertently by a customer, this can be easily compensated by pressing the “Clear” button. After

the ingredients are chosen, the customer presses the “Give me my Macaroni” button and the

process of preparing the macaroni starts.

Figure 2: Keypad Structure

Power Supply

This product will work with 220V AC 50Hz in normal conditions. In power cut situation, UPS

will step in system and MacQuick will continue to work properly.

Technical SpecificationsTable 1: Electrical Specifications of the Product

Operating Voltage Power

During Cooling: 220 V AC ± %20- 50

Hz

350 W

Without Cooling: 220 V AC ± %20- 50

Hz

100W



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Table 2: Physical Specifications of the Product

Height: 1800 mm

Width: 800 mm

Depth: 800 mm

Weight: 250 Kg

In addition to specifications mentioned above, MacQuick has some other properties. MacQuick

is approximately 250 Kg so that it is hard to carry. Hence, product is designed with four wheels.

Corners will be circular shaped to avoid possible accidents. Outside of product will covered by

an opaque material (steel is thought) and the inside of system will not be seen by costumers.Front door will help to full ingredients and there will be lock system. Height, width, depth and

weight values are calculated after these extra specifications.

Cost and StandardsTable 3: Cost Forecasts of the Product Components

Arduino Uno 60TL

6 x Stepper Motors 6x60 = 360 TL

Internal Metallic Components 150TL

Bill Validator 520TL

Electrical Components (Motor drivers, sensors) 60TL

Keypad & LCD 20TL

Steel Case 90TL

Cooling System 180TL

TOTAL 1440TL



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Since our differentiation point is to provide healthier food to our customers compared to our

competitors, we aim to fulfill the necessities of Food Safety System Certification 22000.

FSSC22000 takes “Food Safety” as a global concern and tries to encourage the associations to

have more effective and harmonized food safety systems. Food Safety System Certification

22000 will increase the transparency from consumers’ perspective. We also want to have an

accreditation with ISO9001:2008 standard in the near future in order to increase quality

understanding within the company. By doing so, we will be able to increase profitability, market

share, employees’ satisfaction and customers’ satisfaction.

Quality Function DeploymentAs it is already emphasized in the definition, the main aim of the quality function deployment is

to integrate user demands into quality design process in order to obtain customer focused

products. Our aim is to shape related chats about technical and general product characteristics

according to the customer expectations.

Data Gathering

To find the right expectations of customers, we have created a sample that has similar

characteristics with our target group. This sample involves 50 students from 5 universities

including Bilkent, Boğaziçi METU, Ankara and Koc University; and 50 university stuff fromthese universities. We mainly aim to have a young population with different incomes and

characteristics. The survey is made to understand the willingness to use MacQuick from

consumers’ perspective since it does not exist on the market.

Characteristics of participants are shown in the figures:

I. Age Interval

Age Interval Numbers Percentage

15-20 36 0,36

20-25 30 0,3

25-35 34 0,34



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II. Level of Education

Level of Education Numbers Percentage

High School 20 0,2Undergrad 60 0,6

Grad. 12 0,12

Above 8 0,08

III. Monthly Income

Monthly Income Numbers PercentagesBelow 650 TL 20 0,2

650 -1000 TL 36 0,36

1000 - 2000 TL 26 0,26

Above 2000 TL 18 0,18



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Customer Importance Ratings

Performance Rating

1. Perceiving food quickly 5

2. Hygiene 3

3. Taste stability 3

4. Ingredient selection 4

Usability Rating

1. User friendly 42. Appearance 2

3. Affordable 5

4. Reliable 3

5. Healthiness 4



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Technical Properties

Product Specification Organizational Difficulty

1. Serving capacity 6

2. Prevention disturbance to environment 8

3. Simple working principle and durability 7

4. Practical usage 3

5. Security 7

6. Payment system 3

7. LCD screen 1

8. Keypad for ingredient selection 2

9. Power supply 3

The relations and objectives are defined with the following symbols:



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The correlation matrix for the product specifications is:



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The relationship diagram:



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The results of the matrix:

As a result of the relationship diagram, the most important product specification appears as

“simple working principle and durability”. Since it is the most essential requirement that has a

huge impact on functionality of the product, the result is quite predictable. The second most

important specifications appear to be “prevention disturbance to environment”, being quite

significant for essential customer requirements hygine, healthiness and friendly usage; and

“keypad for ingredient selection”, helping to increase the easiness of usage.



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The trend of competitive analysis is shown in the figure:

ConclusionProduct requirements document is written to explain functions of product, interface definitions,

costs, standards, technical and physical specifications. Functions of product mainly points out

customer related details and functions consist of serving capacity, preventing disturbance, simple

working principle, durability, practical use and security. These functions will help users to see

their expectations from product. Payment system, LCD, keypad and power supply are explained

under interfaces of product. Technical specifications are also specified in two parts which are

electrical and physical specifications. Approximate value for the cost of MacQuick is given and

explanation about future planning of standardization of product is stated. Finally, we worked on

quality function deployment by integrating user demands to design and we show them in tables

and graphics.



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Appendix

Figure 1 - The Rough Drawing of the Product

References

1. “FSSC 2200”.<http://www.tuvkalite.com/hizmetler/fssc22000-pas220-gida-kalite-belgesi >

2. “Mini Büfe”. <http://www.elektral.com.tr/php/TR/Satis_Ve_Servis_Otomatlari_Mini_Bufe.php >

3. “Program Requirements for Refrigerated Beverage Vending Machines”. <http://www.energystar.gov/ia/partners/prod_development/new_specs/downloads/vend_machines/ES_V1.0_VendingMachine_spec.pdf >

4. “Tru-Vend”. <http://www.satisotomatlari.com/default.asp?rsm=121000000000 >

http://www.tuvkalite.com/hizmetler/fssc22000-pas220-gida-kalite-belgesi

http://www.elektral.com.tr/php/TR/Satis_Ve_Servis_Otomatlari_Mini_Bufe.php

http://www.energystar.gov/ia/partners/prod_development/new_specs/downloads/vend_machines/ES_V1.0_VendingMachine_spec.pdf


http://www.satisotomatlari.com/default.asp?rsm=121000000000
































































































team2_product requirements document 11.22.2011

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