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EDSGN 100
Section 204
Design Project #1: Foldable Shopping Cart
Group 4
Submitted by: Meagan O’Hare; Shawnasty Bankovich; Michael Lydon; Shubam Kapadiya
Submitted to: Xinli Wu
July 25, 2013
Table of Contents
Abstract ………………………………………………………………….…Shawnasty Bankovich
Introduction…………………………………………………………………Shawnasty Bankovich
Description of Design Task:
Problem Statement………………………………………………….Shawnasty Bankovich
Mission Statement…………………………………………………..Shawnasty Bankovich
Design Specifications………………………………………………...……Meagan O’Hare
Design Approach:
Project management - Gantt chart……………………………….…………Michael Lydon
Customer needs assessment………………………………………….……Meagan O’Hare
Concept generation…………………………………………………………Michael Lydon
Design matrix……………………………………….…Shubam Kapadiya; Michael Lydon
Selection matrix………………………….………Shawnasty Bankovich; Meagan O’Hare
The Final Design and its Prototype:
A complete set of working drawings of your final design…………...…Shubam Kapadiya
Digital image of prototype/scale…..Shawnasty Bankovich; Shubam Kapadiya; Michael
Lydon; Meagan O’Hare
Design features………………………………………………………….…Meagan O’Hare
Operation instructions……………………………………………………..Meagan O’Hare
Engineering Analysis:
Working mechanism ……………………………………………..……….Meagan O’Hare
Cost analysis………………………………………………...………Shawnasty Bankovich
Summary and conclusions ……………………………………………….…Shawnasty Bankovich
Acknowledgement …………………………………………………….……Shawnasty Bankovich
References …………………………………………………...……………………Meagan O’Hare
Abstract
This project has enabled us to build upon our problem given and work through the
process of design as we would in a real situation. We created designs and weighed the different
sketches through a matrix. A not-to-scale prototype was produced of the selected design.
Introduction
This is the first of two projects in EDSGN 100 for the summer session 2 semester under
the direction of Dr. Xinli Wu. We were assigned to groups and given the task of constructing a
folding shopping cart with certain specifications.
Design Task
Problem Statement
Have you ever been in a situation where you were in need of a cart while you
were not in a store? Maybe you have lived in an apartment or an area where it is common
to use public transportation. A conventional cart is large and not compact for storage
purposes. A design is needed for a compactable cart.
Mission Statement
Our mission is to design and create a prototype for a cart that is capable of being
compacted. This design is to meet certain specifications along with being economical and
cost efficient.
Design Specifications
The folding shopping cart should be easy to use (and assemble, if required).
The folding shopping cart should be ideal for transporting groceries and some other
materials.
The folding shopping cart should fold compactly for easy storage.
The material cost for the folding shopping cart should not exceed $50 unless it can be
justified.
The folding shopping cart should have a weight capacity of 100 lbs
Design Approach
Gantt Chart
Table 1. (below) is a Gantt Chart showing our time and how it was spent.
Customer Needs Assessment
Customers need a foldable shopping cart which is affordable and versatile. The
original shopping carts are large and can hold many items, but the problem occurs when
the shopper needs to take the goods from the store. For instance, if the customer needs to
walk or take a bus, the initial shopping cart would have to remain at the store from which
it came. The innovative foldable shopping cart would put ease on the mobile shopper.
The foldable shopping cart would fold up into a backpack for simplicity and easy storage.
Design Specifications
The folding shopping cart should be easy to use (and assemble, if required).
The folding shopping cart should be ideal for transporting groceries and some other
materials.
The folding shopping cart should fold compactly for easy storage.
The material cost for the folding shopping cart should not exceed $50 unless it can be
justified.
The folding shopping cart should have a weight capacity of 100 lbs.
Design Matrix
Table 2. (below) shows our design matrix used in the developmental process.
A B C (Reference) D E F
Selection Criteria
Specifications of Class 0 0 0 + 0 0
Creativity/ Innovation - - 0 0 0 0
Working mechanism
and operation
instructions are clear 0 - 0 0 0 -
Ease of Operation 0 0 0 - - -
Safe to use 0 0 0 + + 0
Cost Efficient - - 0 - - -
Sum + 0 0 0 2 1 0
Sum - 2 3 0 2 2 3
Sum 0 4 3 6 2 3 3
Net Score -2 -3 0 0 -1 -3
Rank 3rd 4th 1st 1st 2nd 4th
Continue? No No Yes Yes No No
Selection
Matrix Selection Criteria
Weight
% Rating
Weighted
Score Rating
Weighted
Score
Specifications of Class 10 3 0.3 4 0.4
Creativity/ Innovation 5 3 0.15 3 0.15
Working mechanism
and operation
instructions are clear 20 3 0.6 3 0.6
Ease of Operation 10 3 0.3 2 0.2
Safe to use 40 3 1.2 4 1.6
Cost Efficient 15 3 0.45 2 0.3
Total Score
3
3.25
Rank
2nd
1st
Continue?
No
Develop
Table 3. (above) shows our Selection Matrix used in the selection process.
The Design and its Prototype
Working Drawings
FIG. 1. Design A
FIG. 2. Design B
FIG. 3. Design C
FIG. 4. Design D
FIG. 5. Design E
FIG. 6. Parts Design
FIG. 7. Canvas Bag
FIG. 8. Steel Rods
FIG. 9. Wheels
Engineering Analysis
Digital Pictures of Prototype and
its Scale
FIG.10. (right) Shows Meagan O’Hare with the
prototype on her back displaying its versatility as a
backpack with a 2:1 scale.
FIG. 11.
(left) shows
the prototype with the scale of 2:1
FIG. 12. (right) shows the skeletal strutting of the
prototype at a 2:1 scale
Design Features
Foldable Frame
4 Rubber Wheels
Canvas Bag
Can Use As Backpack
3’ Tall
Operation Instructions
To open shopping cart pull bottom down and snap handle bar into place. To close bag
and use as backpack, fold bottom towards back and snap into place; fold handle down
towards bag
Working Mechanism
The support structure of our shopping cart is made of hollow aluminum rods. There is a
base plate made up of cross-hatched aluminum and two attached support beams going up
the back, with 3 beams connecting the two in the middle. The strap material connects the
top corners of the back and the opposite corners of the base. The canvas bag itself is
nailed to the back for stability.
Cost Analysis Table 3. (below) shows our expenditures.
Cost Assessment
Product Description Product Number Price $ Quantity Subtotal $
Wheels 22575T18 3.59 4 14.36
Canvas 8777K13 2.89 4 11.56
Aluminum 9008K17 4.67 2 9.34
Strap Material 8778K1 1.31 1 1.31
Strength Thread 2057T76 8.55 1 8.55
Total
45.12
Summary
The four of us worked together to complete the goal of designing and constructing a
prototype based on the design statement, “Design and build a prototype of a folding
shopping cart for people without cars, or people that need to carry groceries longer than
from garage.” We worked through the design process together and reached out goal.
Conclusion
We would like to thank Dr. Xinli Wu and our TAs Nick and Yoon for their assistance and
patience. This project was very helpful and descriptive in the sense that it exposed us to
the design process that we may use in the future.
References
"McMaster-Carr." McMaster-Carr. N.p., n.d. Web. 24 July 2013.