design of a universal device for...

M.S.Ramaiah School of Advanced Studies 1

Design of a Universal Device for Currency

Recharging of Cell Phones for Retailers in India

Shiju Andrews BTB0910014, FT2010

M. Sc. (Engg.) in Product Design

Proposed Academic Guides :

Mr. Supradip Das (Asst. Professor, DOD)

Mr. Prakash Unakal (Professor, DOD)

Industrial Guide/s :

Shiju Andrews


Project Objectives

• To carry out literature review on cell phone currency recharging methods, understand the latest trends, present practices and collect relevant data.

• To collect data of existing designs through product study, visual design exploration, user study and market study.

• To create QFD on basis of customer voice and arrive at PDS to meet the customer requirements.

• To generate concepts as per PDS, create 3D models of the generated concepts and select the final concept using weighted ranking method.

• To build a mock up model of the final concept and take user feedback.

Shiju Andrews


Project Plan Process Phase Task Software/tools

Planning

Planning

Problem Definition: Need for a universal device which can access any service providers for cell phone currency recharge. Referring Books, Journals,

Magazines, Articles and Internet research. Patents study

for multiple SIM technology used in cell phones.

Referring case studies of cell phone currency recharging devices, multi SIM technology and its basic working principles Referring previous projects related to similar kind of devices Identifying the major requirements for the project such as electronic controls, Touch Screen Interface & Cell Phone technology.

Design Intent Design a device considering ergonomics, aesthetics and usability.

Design Research Internet Articles, Digital

Camera for Gemba Study, Photoshop, Sketching Tab and

Questionnaires for data collection.

Product Study Study features of similar products, materials used – Mobile Phones Market Study Study existing methods in market for cell phone currency recharging

Visual Design Study Study elements of design through form exploration, aesthetics and metaphors (Design Inspired by Nature).

Customer and User study User Experience study to derive consumer insights

Product Specification Target Product Design Specification QFD & PDS

Design

Ideation

Concept Generation-Sketching-Rendering Photoshop, Catia, Keyshot

Concept Selection Weighted ranking method

Concept Testing VOC confirmation

Representation 3D Modeling Alias, CatiaV5, Solid Works Rendering Hyper shot, Key shot Presentation Power point

Detailed Design CAD drawings with dimensions CatiaV5, Auto Cad Material Bills MS Excel

Validation Physical model

Material selection Exploration on Materials, PU Foam, Sun board, Wood

Making proof of concept and mock-up model Model making tools, Painting Tools, Screen Printing

Feedback

Shiju Andrews

M.S.Ramaiah School of Advanced Studies Shiju Andrews 18

PDS for Universal Cell Phone Currency Recharging Device

SI No Factors Specifications 1 Product Name Universal Cell Phone Currency Recharging Device - Easy Top 2 Area or Environment of use Retailer Shops, STD/PCO, Cyber Cafe, Music Shops, Chemist, General Stores 3 Target Customer Retail Shop Owners 4 Colours Black, Gray, White 5 Material Body - Plastic, Covering - Laminates, Steel Brackets, Touch Screen Interface - Standard 6 Mounting Table Top 7 Screen Type Touch Screen 8 Size 365 x 250 x 120 mm 9 Touch Screen Size 10” 10 Screen Angle 30 to 35 Degrees 11 Type of Access Password Protected 12 Network Connectivity Through SIM Cards 13 Number of SIM slots 20 to 25 14 Aesthetics Graphic Stickers, Pleasant Colours, Innovative Design 15 Life Span 10 Years 16 Maintenance Once in 6 Months 17 Ergonomics Reach of Controls, Display, Accessibility 18 Interface Software Supported 19 Texture Smooth 20 Quality Durable, Requires minimum maintenance 21 Features SIM Card Holder, Inbuilt Printer, Cordless Phone 22 Battery Specification Large Capacity Lithium Ion Battery 23 Process of Manufacturing Moulding, Fabrication 24 Sound Indications Beep 25 Cost 16000 to 18000 INR

PDS


Concept - 1 Detailing

Advantages Disadvantages

Elegant form derived from nature is attractive and ergonomic.

Adjustable secondary interface with hinge mechanism is delicate and there are chances of breakage.

Light weight and usability are other advantages of this concept.

Text orientation defined for LED indicators is not visually well pleasing.




Attract customers through appealing design form incorporated in this concept. Add value to the service by improved usability.

Product form developed from boomerang shape metaphor have compromised the design on other areas such as receiver, screen orientation.

Easy to manufacture in two halves of plastic components since the overall device form is simple.

Accessibility for the thermal printer paper roll changer unit is not ergonomically well pleasing.




Form derived from visual design study, neck of a swan makes the concept compact and light weight.

Design is delicate because of the form, hence it requires extra care in handling.

Position of power button is ergonomically well placed in this concept for better accessibility.

Manufacturing cost would be high for the outer covers which will increase the product cost.




Rib structures with flat base provides better strength and elegant look for the concept.

As per the feedback in participatory concept selection method, Overall device form does not fit in to a retail shop environment.

Position of power button is ergonomically well placed in this concept for better accessibility.

Paper roll changer position on right bottom side has accessibility issue.




Rugged form gives good strength for the device with proper base support.

Since the overall form is complex, it is difficult to manufacture.

Primary screen is removal from front side of the device which would enable easy SIM change if required.

Secondary screen is delicate and needs extra care in use. Rib above the receiver holder may obstruct the removal of receiver.


Concept Selection Weighted Ranking Method


Design Validation Mock up model validation in retail shop environment

Basic Parameters Validated for Easy Top Mock up Model

Product Form Basic size, look and feel of the product User Experience End user interaction with the product considering ergonomic

parameters (Validated using mock up model supported by software system)

Visual Appearance Aesthetics, colour and surface texture


Conclusion

This project has given opportunity to explore new product

design and development process from an identified need in market.

It has been a wonderful experience to work as an individual and I

realise that the end result is really satisfying.

design of a universal device for...

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