Product Assembly Kit

1
Product Assembly Kit

• C. A. Collins

2
The Product

• A model assembly kit.
• A 1/72nd scale aircraft.
• Rated skill level 4 of 5.
• Its selection was inspired by the DFA tenets
  associated with assembly toys.

3
Product Assembly Drawing
4
Manual Assembly

• Tools are required
• Cut parts from trees
• Tweezers small parts
• Glue applicators
• Paints brushes
• Magnifier glass
• Speed accuracy limited by physical skills of
  operators

5
Product DFA Analysis

• The sum of parts totals 80 components
• The product does not minimize parts
• The small parts hamper assembly process
• Gluing parts does not reduce skill or time
• Low CAM and PAM indicate poor design

6
Product Design Changes

• Design for simplicity join fuselage nose
• Minimize small parts probes, seats, etc.
• Drop redundant parts windshield, etc.
• Snap fit parts to lessen skill and time.

7
Redesigned Assembly Drawing
8
Evaluation of the Redesign

• The parts total only 18 for a 78 reduction
• CAMPAM improved to 9.69 high merits
• Snap fit parts lowers skill level, lessens time
• Has all DFA tenets for good assembly toys
• Has improved hard assembly probability

9
Conclusions

• Design the product so that it is easy to assemble
  manually consequently it is highly probable
  that it will be easily assembled automatically.
  Andreason