memo draft (2)
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University of South Florida *
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Course
3000
Subject
Industrial Engineering
Date
Feb 20, 2024
Type
Pages
2
Uploaded by JudgeRiver13419
Date: October 23, 2023
To: Dr. Akintewe
From: Graceson Jankovich from Group #9
Subject: Approval Request for Group #9’s Robotic design
For the past several weeks, my group mates and I have been working on different robot designs for
children in order to promote future interest in STEM careers. Our group has worked both individually
and together to create many different and unique designs. After the discussion of many various
designs, the team has narrowed the selection down to two. Our final two robot designs are Modular
Gocart (Figure #1 in Appendix) and Tipping Tractor (Figure #2 in Appendix). Both designs consist of a
single main chassis with pre-printed holes and attach points for the hardware. However, the Tipping
Tractor design is very complex and fragile while the Modular Gocart is simple and strong. Between
the two we have decided that Modular Gocart is the best option as it fully fulfills the customer needs
and its modularity allows for the children to grasp a deeper understanding of the technology behind
the robot.
Modular Gocart’s Candidate design:
The group based the final design decision based off of Weighted Benefit Analysis and Customer
Needs as well as the Engineering Specifications. Both data sets can be found in Tables #1 and #2
located in the Appendix.
●
Based on Table #1 below, the customer needs required that reliability and affordability were the
highest weighted. In light of the weighting, the Modular Gocart design is perfect as it is a
simple 3-D printed chassis that is strong and with a low filament cost. In contrast, the Tipping
Tractor Design is more of a novel idea with high printing cost.
●
Both Table #1 and Table #2 relate to the grading and selection process that the team went
through in order to determine which design to submit. The tables take into account what is
important to the customer but in conjunction with what is important to us as engineers.
●
As you can See in Table #2 in the Appendix, A low cost, small form robot with simple
construction was needed to meet the engineering specifications and their respective metrics.
The complexity and high cost of the Tipping tractor design removes it from contention in this
category. The Modular Gocart, however, can be quickly assembled and uses a cheap chassis
with a lighter weight which also contributes to the efficiency of the battery life.
●
During the Heuristic Cards activity our group further developed the idea of modularity based off
of card #24, “Contextualize.” Using this card and its ideas the group decided to make all the
components of the robot easily accessible, removable and replaceable to allow for easier
construction and learning.
Please let me know by October 12, 2023 if you have any questions or if you are ready to give
approval of our design.
Appendix
Table #1: Discussion and Weighting of Customer Needs
Weighting
Customer needs
10/10
Reliability
9/10
Affordability
7/10
Performance
5/10
Design
5/10
Simplicity
Table #2: Description of Engineering Specifications
Target Value
Metric
< $40
Cost of all Parts
6” x 6” x 6”
Size
< 5 minutes
Assembly Time
> 10 minutes
Battery Life of Robot
Figure #1: Design 1, Modular Gocart
The design is made up of one solid 3-D printed chassis and resembles an average Gocart. The
overall size of the robot is very small compared to the other designs.
Figure 2: Design #2, The “Tipping Tractor” from the movie “Cars”
The design is based off of the tipping tractor from the movie, “Cars,” and will be covered with a
printed removable cover to enclose the robot.
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