4.3.2 Manufacturability Trade-offs
By using the Semantic Differential Scale;
Most Favorable – 2 (Ideal) Least Favorable – 1
The most favorable gets a perfect score of 2 points, which is the ideal. In terms of the Material Availability,
the proponents utilized Semantic Differential Scale to determine which among the Design Alternatives and
their required materials are the easiest and most challenging to find and acquire in completing the Design
Project.
Constraint
Consideration
Manufacturability
Material
Availability
Difficulty
Production
Design Alternative
1
The materials are
slightly difficult to
obtain
of The design is
slightly
challenging
to
build.
Design Alternative
2
The materials are
easy to obtain.
Design Alternative
3
The materials are
expensive
but
easy to obtain
The design is easy The design is
to
build
and slightly easier to
install.
build and install.
Table 14. Justification of Manufacturability Trade-off
The materials for the three alternative designs are easy to obtain if we disregard the cost. The design
alternative 1 uses a pulley system which materials are tricky to find in any hardware stores. The materials
in design alternative 2 are easy to obtain considering it only relies on an electric actuator. And for design
alternative 3, the materials can be obtained easily but it cost more.
Consideration
Material Availability
Difficulty of Production
Total Points
Rating ( %)
Design Alternative 1
1.8
1.8
Design Alternative 2
2
2
Design Alternative 3
1.5
1.5