Crossbow
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DFE Analysis
DFE Guideline | Good Aspects of Competitor Product and Ideas for Improvement |
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0. New Concept Development | Remove fasteners to allow a snap-fit design.
Integrate a quiver into the crossbow itself, instead of having it as a separate part. Add a loading mechanism that does not require a very significant force input from the user. |
1. Select Low Impact Materials | Crossbow:
Aluminum, Fiberglass, Steel Bolt: Aluminum, Carbon Fiber Sling: Nylon, Foam
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2. Reduce Material Amount | Slots in the crossbow body reduce mass
Limb is removable to reduce transport volume The "snap-fit" design would reduce material amount by removing the need for fasteners |
3. Eco-Manufacturing |
Camouflage coating requires an adhesive |
4. Optimize Distribution | Fill this with info
Fill this with info Fill this with info |
5. Reduce Use-Phase Impact | Fill this with info |
6. Maximize The First Life | Fill this with info
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7. End of Life |
Product Life Cycle Analysis
Life Cycle Stage | Description | Inputs | Outputs |
---|---|---|---|
Material Extraction | Steel from Iron Ore
Plastic from Petroleum Fiberglass Raw materials must be processed. | Iron Ore
Aluminum Ore Petroleum Silica sand Limestone Polyacrylonitrile (synthetic) | Steel
Aluminum Fiberglass Plastic Carbon Fiber |
Production | Components | ||
Use | Crossbow, Bolts | Shooting Crossbow | |
End of Life | Retiring/Disposal | Crossbow, Bolts | Landfill |
Transportation | Airplane, Boat, Truck | Fuel, Crossbow, Bolts | Crossbow, Bolts |
EIOCLA
The economic input-output life cycle assessment (EIOCLA) was used to determine the environmental impact of the production of an individual crossbow and to gauge whether or not a CO2 tax would affect the economics of this product. A baseline economic activity of $1,000,000 was used for data generation and then later scaled down in order to generate more relatable data.
Item | Crossbow | Bolts | Strap |
---|---|---|---|
Sector # and Name | 339920
Sporting and athletic goods manufacturing | 339920
Sporting and athletic goods manufacturing | 314910
Textile bag and canvas mills |
Reference Unit | 1 crossbow | 1 bolt | 1 strap |
Units consumed per product life | 1 crossbow | 6 bolts | 1 strap |
Retail cost per unit (2002) | $121.00 | $25.70 | |
Lifetime cost | $121.00 | $25.70 | |
Sector mtCO2e Per $1M | 613 tons | 613 tons | |
Implied mtCO2e per Product Life | 0.074 tons | 0.016 tons | |
CO2 Tax @ $30/mtCO2e | $2.23 | $0.47 |