Engineering Design Concepts

Engineering Design Concepts

Problem Definition and Need Identification
  • Goal: Create a statement that describes what needs to be accomplished to satisfy customer needs.
  • Initiates product development by identifying essential needs products must meet.
  • Importance: Most crucial step in the Product Development Process (PDP).
    • Involves:
    1. Analyzing competitive products
    2. Establishing target specifications
    3. Listing constraints and trade-offs
Need Identification
  • Understanding the problem thoroughly is key to outstanding solutions.
  • Historical context: There has always been a need for improvement and new designs.
    • Notable quote by Lincoln Steffens highlights untapped potential in the world.
Role of Engineers
  • Engineers use scientific knowledge to fulfill human needs; first task is identifying real problems.
  • Problems often presented vaguely—requires engineers to define issues clearly.
    • Examples: "The shaft is breaking."
  • Clearly formulate the problem in precise engineering terms to find effective solutions.
Examples of Problem Definition
  • Example case: Excess irrigation water in parks due to caretaker negligence.
    • Ask targeted questions to clarify the problem; more precisely define: "How to prevent water waste?"
Identifying Customer Needs
  1. Who are the customers?
  2. What do the customers want?
  • Two definitions:
    • Webster: A purchaser of a product/service.
    • TQM: Anyone who receives or utilizes what is provided.
Preliminary Research on Customer Needs
  • Focus on needs that are:
    • Unmet in the market.
    • Similar to the proposed product.
    • Historically addressed.
    • Technologically viable in engineering similar products.
Techniques for Gathering Information
  • Interviews: Direct interaction with customers; collect qualitative data and feedback.
  • Focus Groups: Group discussions to elicit detailed opinions and needs.
  • Customer Surveys: Written questionnaires to quantify feedback.
  • Data Analysis: Warranty data, customer complaints, etc.
Survey Construction Guidelines
  1. Define the purpose of the survey.
  2. Identify specific information needed.
  3. Design unbiased, clear, and brief questions.
    • Types of questions:
      • Attitude: Customer feelings about the product.
      • Knowledge: Customer awareness of product details.
      • Behavior: Customer usage patterns.
  4. Order questions for logical flow.
  5. Pilot the survey on small samples before wider distribution.
  6. Ensure representative sampling for reliable results.
Importance of Market Analysis
  • Conduct market analysis at the start to validate potential opportunities.
  • Analyzes total market aspects:
    • Trends, competition, volume, profit, consumer needs, etc.
Techniques for Market Analysis
  • Direct Search: Collect information from customers and manufacturers through interviews and surveys.
  • Indirect Search: Use publicly available data sources (patents, journal reports).
Customer Complaint and Feedback Mechanisms
  • Analyze customer complaints and warranty data.
    • Source insights on product strengths/weaknesses for upgrade opportunities.
    • Utilize online platforms for customer feedback.
Product Information and Patents
  • Useful in providing idea for product features or safeguarding innovation.
  • Types of patents: utility and design patents vary in coverage.
    • Strategy: Use keywords and other identifiers for patent searches.
Industry and Company Information
  • Understand industry segments and key players to make informed decisions.
  • Company data can reveal valuable insights into financial health and product offerings.
Market Research Reports
  • Utilize commissioned reports to gauge market dynamics and trends.
Case Study: Automatic Aluminum Can Crusher
  • Goal: Design a fully automatic machine for crushing aluminum cans.
  • Requirements include functionality, safety, dimensions, and cost constraints.
Distinction Between Needs and Requirements
  • Needs: Vague wishes expressed by customers.
  • Requirements: Detailed specifications defining what the product must achieve; more structured than needs.
Customer Requirements Categories
  1. Performance: Measurable characteristics of products.
  2. Features: Additional characteristics for customization.
  3. Reliability and Durability: Long-term performance indicators.
  4. Serviceability: Ease of repair post-release.
  5. Aesthetics: Customer's emotional response to product appearance.
  6. Perceived Quality: Reputation based on past similar products.
Importance of Prioritizing Requirements
  • Effective prioritization helps balance essential versus desirable features, addressing customer conflicts and ensuring optimal product development.
  • Distinguishing essential requirements (demand) versus non-essential wishes helps maintain focus on key design criteria.
Kano Diagram for Requirements
  • Categorizes requirements into Basic, Performance, and Exciter (Delighter) features, each influencing customer satisfaction at different levels.
Quality Function Deployment (QFD)
  • QFD is a strategic tool to ensure customer needs are met throughout the design process.
  • Consists of several phases, commonly represented in the House of Quality (HOQ).
  • The HOQ translates customer requirements into measurable engineering characteristics, facilitating product planning and design processes.
Conclusion
  • Proper engineering design integrates thorough problem identification, customer-centric solutions, and quality methodologies to enhance product development success.