B5 Stock/ Back Plate

By: Eric Shing, Inderbir Deol & Birinder Deol

B5 Stock/ Back Plate

• Push pin assembly to marker• Holds internals of marker together• Doubles as battery compartment door

Issue Of Current Design:

• Sloped at awkward angle• Current design encourages marker to move in

a downward, sliding motion towards the armpit during operation

Proposed Design

• Addresses awkward angle• Encourages marker to recoil into shoulder of

user

Market

• Owners of the B5 modification• Values ergonomics of bullpup marker design• Receptive of modifications that would further

enhance ergonomics of current design

Costs Over 4 Year PeriodEquipment, 100,000

Labor, 2,000,000

Material, 7,800,000

Overhead, 1,980,000

Shipping, 660,000

Packaging, 660,000

Selling Price

Total cost over 4 years for Tooling, Labor, Materials, Overhead, Shipping, and Packaging:$100000 + $2000000 + $7800000 + $1980000 + $660000 + $660000= $13200000

Cost per part:$13200000/ 4800000 Parts = $2.75 per part

Final selling price, for a profit of 30%:$3.58 per piece.

Critical Tolerance: Function

• Distance between holes for pushpins make or break the design

• Improperly positioned pushpin holes will render product completely useless

Critical Tolerance: Cost• Simple go/ no-go fixture required for checks• Fixture should add no more than $500 to

equipment Costs• If additional employee is required to perform

go/ no-go check, additional cost of labor is $50,000 per year, $200,000 for four year production run

• Each part, with additional employee, is now $2.78 ($13,400,500/ 4,800,000)

CAD

CAD Critical Dimension

Manufacturing

WHY?

• This machine allows for faster processing because the screw rotates 100% of the time

WHY?

• The possibility of a small shot size is reduced using this process.

WHY?

• Capable of achieving great external details in the part

• This process is capable of producing high quality parts with a low rejection rates. This process has been proven in the industry since being developed in the 1950s

Quality Control

• Measuring the holes for pin specification using a 0.25 in go gauge and a .261 in no gauge

Quality Control

• The distance between the holes will be checked using a go no-go fixture.

Video

Thank You