1. The Design Process example for ITT Sept 2015
11/22/2018
New Grocery Bag Project

2. New Grocery Bag Project
Problem statement
Design a stronger plastic bag for carrying groceries home without the bag breaking
11/22/2018
New Grocery Bag Project

3. New Grocery Bag Project
Design Brief
The effort will concentrate on finding alternative materials for use in making the bags that must be inexpensive and recyclable
11/22/2018
New Grocery Bag Project

4. Investigation and research
The results of our research efforts found the following:
Alternative materials were available
Consider making the bags of a heavier gauge
Reinforce the inside of the bags
11/22/2018
New Grocery Bag Project

5. Alternative solutions :
The results of our research efforts found the following:
Alternative materials were prohibitively more expensive
Some materials seemed to add an odor that the design team felt would be offensive to the consumer
The best option seemed to be using a heavier gauge of the same material.
11/22/2018
New Grocery Bag Project

6. Choosing a solution :
Using a heavier gauge was chosen since the added cost could be added to the bags as a small surcharge to the bags
The notion of recycling these bags will be considered a plus for the new design
New Grocery Bag Project
11/22/2018

7. New Grocery Bag Project
Developmental Work :
Efforts were focused here on finding the right balance with additional gauge weight of bag vs additional cost. The following chart displays the options:
11/22/2018
New Grocery Bag Project

8. Developmental Work : Gauge vs added cost
Capacity
Cost
Note
+1 mills
+5 lbs
+10 cents
*optimal
+2 mills
+10 lbs
+20 cents
Somewhat cost prohibitive
+3 mills
+15 lbs
+30 cents
More cost prohibitive
11/22/2018
New Grocery Bag Project

9. Modeling and Prototyping
Design team found that along with the heavier bags the handles must also be heavier
Team also found that some of the cost could be recovered from advertising on the side of the more durable bags
11/22/2018
New Grocery Bag Project
11/22/2018
Cch 1 intro to renewable Energy 9 9

10. New Grocery Bag Project
Sketch/Drawing
11/22/2018
New Grocery Bag Project
11/22/2018
Cch 1 intro to renewable Energy 10 10

11. Testing and Evaluating
The team found that the chosen bags could carry 5 more lbs and that consumers would react positively
Handles were not proving reliable with the added weight that bags were expected to carry
11/22/2018
11/22/2018
New Grocery Bag Project
CH 9 - A BASIC APPROACH TO LTG DESIGN 11 11

12. Redesigning and Improving
It was discovered that consumers were in need of a better handle on the bags
The team found a heavier handle pleased the consumers and made the bags more reliable
11/22/2018
New Grocery Bag Project