Needs Assessment CIVE 4312 Hanadi Rifai

Engineering Design Process Iteration Needs Assessment Problem Formulation Abstraction And Synthesis Analysis Implementation

Establishing Need Concern for health, safety and quality of life of public Concern for health, safety and quality of life of public Redesign existing product Redesign existing product Better solution for a particular task Better solution for a particular task

All Problems are not Equal

Success vs. Failure Failure - inability of engineering solution to perform its intended function Error - underlying cause for failure

Causes of Failure Concrete level - Specific physical source (O-ring seal in Challenger) Concrete level - Specific physical source (O-ring seal in Challenger) Process Level - Invalid assumptions or flawed execution (O-ring gaskets and putty assumed sufficient on Challenger) Process Level - Invalid assumptions or flawed execution (O-ring gaskets and putty assumed sufficient on Challenger) Perspective Level - Flawed value system (Manufacturer of Challenger booster- rocket overrode engineering recommendations) Perspective Level - Flawed value system (Manufacturer of Challenger booster- rocket overrode engineering recommendations)

Design Proposal Engineers often prepare formal design proposals to justify expenditure of time, money and effort. Why? Who? Where? How? When? What? How much?

Structure of a Proposal Objective (Why?) Objective (Why?) Background (Who? Where?) Background (Who? Where?) Methodology (How? When?) Methodology (How? When?) Expected Results (What?) Expected Results (What?) Costs (How much will it cost?) Costs (How much will it cost?) The design proposal is a plan

Methodology Approach Approach Tasks Tasks Who will perform tasks Who will perform tasks Schedule of completion Schedule of completion

Gantt Charts TasksQ1Q2Q3Q4 Gather Data Conceptual Design Select Alternative Reporting