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If there is evidence (for example, in the form of a market survey for example) that a bicycle mounted cell phone carrier could be designed and produced at a reasonable rate, and sold for a profit, the need to design would be justify.

1.Patents

2.Survey cell phone carrier makers

3.Talk with other engineers

4.Survey possible users

5.Mechanical devices sourcebooks (vendor catalogs, etc.)

6.WEB

Functions:

to safely and securely hold an electronic cell phone to a bicycle

to ensure easy access of the phone to the rider at any time

Goals:

Protect the cell phone from damage

Provide a convenient way for a rider to attach their phone to the bike

Constraints:

Cost

Can not compromise the safety of the rider

Must be weather resistant

Criteria:

Aesthetically pleasing

Light weight

Easily attached to bike

Allow rider to provide electric charge to carrier with pedaling

The synthesis process is iterative

Assumptions:

Dynamic loadings

Loadings should be examined at interface of bicycle and carrier, at mountings

vibration isolation of phone should be carefully considered

weather resistant materials should be specified