Prosthetic Arm Force Reducer Team 1 – Halliday's ... - Ohio University

User Need Criteria
Producer
Criteria
Concept
Table 5.2.1 – Concept Scoring
Fabricated
Hook
Otto Bock
Model 10A60
Mechanical Adv.
System
User Need Criteria Standards:
1) Reduced User Input – Does this concept have the potential to provide a significant
reduction in user input force required?
2) Increased Grip Strength – Does this concept have the potential to provide an increase
in grip strength over Tim’s current hook?
3) Serviceable – Could this concept be serviced by the user without the assistance of a
professional?
4) Reliable – Will this product function correctly without regular maintenance so as not
to reduce the users’ productivity?
5) Corrosion Resistant – Can this concept be made out of materials that can withstand
the agricultural environment?
6) Affordable – Will this concept provide enough value to the customer that they can
justify the cost?
7) Simplicity of Use – Will this concept be as easy to use as the customer’s current
application?
8) Light Weight – Will this concept be light enough so as not to discomfort the user with
added weight at the wrist or forearm?
UProducer Criteria:
1) Easily Manufactured – Does this team, as the producer of the product, have the skills
and tools necessary to create and build all parts?
2) Affordable – Can this product be made cheap enough that it can be sold at a profit and
still provide significant value to the customer?
3) Marketable – Would this concept provide a feature that would interest customers?
4) Original – Does this concept provide a feature that is either new or vastly improved
over current products in the market?
Otto Bock
Spring Upgrades
Importance
Factor (0-1)
Rating [( 1-exceeds spec, 0-does not meet spec)*imp. factor]
Reduced User Input 1.0 0.70 0.70 0.90 0.00
Increased Grip Strength 1.0 0.50 0.60 0.00 0.90
Serviceable 0.9 0.36 0.72 0.72 0.63
Reliable 0.9 0.36 0.72 0.63 0.54
Corrosion Resistant 0.8 0.64 0.64 0.64 0.48
Affordable 0.6 0.18 0.42 0.54 0.42
Simplicity of Use 0.5 0.25 0.45 0.40 0.35
Light Weight 0.4 0.20 0.28 0.28 0.32
Easily Manufactured 0.9 0.09 0.90 0.63 0.90
Affordable 0.8 0.24 0.40 0.72 0.40
Marketable 0.8 0.16 0.64 0.40 0.48
Original 0.5 0.40 0.25 0.40 0.25
TOTAL 4.1 6.7 6.3 5.7
Relevance (1-highest, 4-lowest) 4 1 2 3
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