From DDL Wiki

Contents 1 Executive Summary 2 Primary Stakeholders and Product Needs 3 Product Function and Evaluation 4 List of Parts 5 Design For Manufacturing and Assembly [DFMA] 5.1 Design For Manufacturing [DFM] 5.1.1 DFM Summary 5.2 Design for Assembly [DFA] 5.2.1 DFA Summary 6 Failure Mode and Effect Analysis [FMEA] 7 Design for Environment [DFE] 8 Team Members [TM] 9 References [REF]

Executive Summary

Primary Stakeholders and Product Needs

Product Function and Evaluation

This application of a single-gear bicycle drivetrain offers a cost-efficient solution for transportation. It forgoes torque/power control for simplicity and low cost. The chain tensioning system is of particular interest as it is rudimentary and difficult to perfect.

Usage

Mechanical Function

Preliminary User Study

List of Parts

Parts list table

Part Number	Name	Quantity	Mass (g)	Subassembly	Function	Material	Manufacturing Process/ Purchased Component	Image
1	Dustcaps	2	<1	Crank Assembly	Keep dirt out of bottom bracket	Plastic	Injection Molding
2	Lock nuts	2	6	Crank Assembly	Retainment/Assembly	Steel	Catalog Purchase
3	Nut w/ integrated lock washer	2	16	Crank Assembly	Retainment/Assembly	Steel	Catalog Purchase
32	Frame	1	2272	Frame	Holds all other subassemblies	Steel	Fabricated/Welded

Design For Manufacturing and Assembly [DFMA]

Design For Manufacturing [DFM]

DFM Summary

Design for Assembly [DFA]

DFA Summary

Failure Mode and Effect Analysis [FMEA]

Design for Environment [DFE]

Team Members [TM]

References [REF]