This document discusses design for assembly (DFA), which aims to improve product design for easy and low-cost assembly. It originated in the 1960s-1970s and focuses on reducing assembly costs by decreasing part counts and simplifying assembly. The document outlines the history and purpose of DFA, different assembly methods, and design guidelines for manual and automated assembly, such as using self-locating parts and avoiding screws/bolts. It concludes that DFA optimizes assembly and should be applied early in the design process to minimize production costs.

2. Shahtaj Keerio
14IN68
Presentation Topic
Design For Assembly

3. Contents
 History
 Design for assembly
 Purpose of design for assembly
 Assembly Methods
 Conclusion
 References

4. History
 1960s-1970s the first evaluation method was
developed at Hitachi and called assembly
evaluation method (AEM).
 Starting in 1977 Geoff Boothroyd developed the
design for assembly method (DFA).

5. Design For Assembly
 “A process for improving product design for easy
and low-cost assembly, focusing on functionality
and on assemblability concurrently.“
OR
 It is a process by which products are designed with
the ease of assembly in mind.
 If product contains fewer parts it will take less time
to assemble there by reducing assembly costs.

6. Purpose Of Design For
Assembly
 Reduce cost of assembly
 Improve quality and reliability
 Reduce part inventory
 Reduce production equipment

7. Assembly Methods
 Manual assembly
 Fixed automatic assembly
 Flexible automatic assembly Design for
Assembly

8. Design Guidelines For
Manual Assembly
 eliminate the need for workers to make
decisions or adjustments.
 ensure accessibility and visibility.
 eliminate the need for assembly tools and
gauges (i.e. prefer self-locating parts). Design for
Assembly

9. Design Guidelines For
Automated Assembly
 reduce the number of different components by
considering
 does the part move relative to other parts?
 must the part be isolated from other parts
(electrical, vibration, etc.)?
 must the part be separate to allow assembly
(cover plates, etc.)?
 use self-aligning and self-locating features
 avoid screws/bolts.

10. Conclusion
 DFA is a tool used to assist the design teams in
the design of products that will transition to
productions at a minimum cost, focusing on the
number of parts, handling and ease of assembly.
 Optimization of the part/system assembly.
 DFA is a tool used to select the most cost
effective material and process to be used in the
production in the early stages of product design.

11. References
http://www.slideshare.net/LeicesterColTechEngCen
tre/design-for-assembly