The document outlines the design procedure for a mechanical engineering project. It discusses the 7-step design process, which includes: 1) creating product design specifications, 2) external and internal research, 3) concept evaluation and selection, 4) detail design and engineering, 5) prototyping and testing, and 7) documentation. Each step produces an outcome, such as a PDS document from step 1 and a final design report from step 7. The document also discusses factors that make developing specifications complex, including production concerns, intellectual property, customer base, and clarity of goals.
1. Design Procedure
Subject: DME
Semester: 5th
Division: FX
Branch: Mechanical
Prepared By (Roll no.):
1. Akash Ambaliya (03)
2. Randhir Chavda (23)
3. Nirav Hadiya (43)
Atmiya Institute of Technology &
Science
Gujarat Technological University
2. What is design procedure
Design process is a collection of procedures and habits that help teams design
better products.
Designing is the process of making many decisions that converts a need into a
hardware reality.
Need Product
4. Design Process Outcomes
Step Outcome
Product Design Specifications PDS Document
External Search (Research) List of existing related products and
technologies
Internal Search (Brainstorming) A lot of solution ideas
Concept Evaluation / Selection Pros and Cons / Decision Matrix
Selection of one idea to implement
Detail Design (Engineering) Determination of all details needed
to build the product
Prototyping and Testing Comparisons to PDS target
Improvement recommendations
Documentation Final Design Report
BOM + Production Drawings
All other reports
5. Detail Design (Engineering)
Lift and Drag Coefficients
(as effected by ground promimity)
0
0.05
0.1
0.15
0.2
0.25
0.3
0.35
0 0.05 0.1 0.15
h/L
Coefficient
Drag Coefficient
Lift Coefficient
More Abstract Engineering Less Abstract
6. Design Process
Applies to Top-level decisions
Applies to lower levels decisions
Define requirements
Search for existing ideas/technologies
Brainstorm for solutions
Pick a candidate
Determine the details
7. Product Development Process
Concept Synthesis
PDS
Concept Evaluation
Candidate Design
Detail Design
Candidate Design
Release for Production
Prototyping
9. Complexities of Developing a PDS
Document
Level-I:
Goal is clear, “Design a X to do Y”
specifications are known,
priorities are known,
no mass production concerns,
IP issues not important,
limited customer base
Example: one-of-a-kind equipment.
10. Complexities of Developing a PDS
Document
Level-II:
Goal is specific “Design a X to do Y”,
Specifications are unknown,
Priorities are unknown,
Mass production concerns,
IP issues are important,
expanded customer base
Example: Most consumer products
11. Complexities of Developing a PDS
Document
Level-III:
Goal is unclear, “Design ? To do ?
There is a general statement of need
Not easy to get to: “Design X to do Y”
Example: Oceans are rising
12. Customers
People who define the PDS
People who influence product success
People you cannot ignore
Team
Company
(Internal)
Globe
(External)
13. Methods of setting targets
Some targets are specified by:
Marketing
Management
Regulations /standards
Users / buyers / retailers
14. Methods of setting targets
Benchmarking + parametric Studies
Technology capability
Field experts
Experimentation
Educated guesses
Select ranges for targets from Barely acceptable to highly desirable