Introduction to Civil Engineering Design

Design Process

General Design Process

1. General Design Process
2. Understand Problem
3. Conceptual Design
4. Embodiment Design
5. Detail Design
6. Prototype and Testing
7. Completion (Implementation)

What is Design

• Creative
• Synthesis
• No Unique Solution/Open Ended Problem
• Collaboration in a Team

Learning of Design

• Problem Formulation is as Important as Problem Solution
• Do Design
• Design Process and Tools

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(CE)E - Design Sequence

(with selected feedback cycles)

The Decision Analysis Cycle

(after Stael von Holstein, 1973)

Deterministic Phase	Probabilistic Phase
1. Define Problem and Limits of Investigation	1. Express Uncertainty in Variables by Means of Probabilities
2. Alternative Courses of Action	2. Probabilistic Model
3. Outcomes of Each Alternative	3. Establish Relative Value of Probabilistic Outcomes
4. Select Decision and State Variables	4. Probabilistic Sensitivity Analysis
5. Relate Outcomes and Variables
6. Time Preference	Information Phase
7. Dominated Alternatives Eliminated	1. Value of Perfect Information
8. Sensitivity of Outcome to Variables	2. Evaluate Various Information Collection Schemes

Design Process

The “Design Circle”

The “Design Spiral”

Pugh Chart

Pugh Chart / House of Quality

Screening Matrix

Scoring Matrix