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Design for Manufacturing
Minimise part count by incorporating multiple functions into single parts
Modularise multiple parts into single subassemblies
Assemble in open space, not in confined spaces; never bury important components
Make parts such that it is easy to identify how they should be oriented for insertion
Prefer self-locating parts
Standardise to reduce part variety
Maximise part symmetry
Design in geometric or weight polar properties if nonsymmetric
Eliminate tangly parts
Color code parts that are different but shaped similarly
Prevent nesting of parts; prefer stacked assemblies
Provide orienting features on nonsymmetries
Design the mating features for easy insertion
Provide alignment features
Insert new parts into an assembly from above
Eliminate re-orientation of both parts and assemblies
Eliminate fasteners
Place fasteners away from obstructions; design in fastener access
Deep channels should be sufficiently wide to provide access to fastening tools; eliminate channels if possible
Provide flats for uniform fastening and fastening ease
Ensure sufficient space between fasteners and other features for a fastening tool
Prefer easily handled parts
http://deed.ryerson.ca/~fil/t/dfmdfa.html
http://homepages.cae.wisc.edu/~me349/lecture_notes/me349_dfa_lecture_notes.pdf
Motorola University Teaches Smarter, Faster Product Designs - Laptop DFA
http://www.dfma.com/news/motorola.htm
Boothroyd and Dewhurst’s DFA Software Drives Cost Savings for Motorola's DS9208 Scanner
Presented by: Chris Foley
At the International Forum on Design For Manufacture and Assembly
June 13-15, 2011, Providence, Rhode Island, USA
http://www.dfma.com/resources/motorola.htm
Simplifying Veterinary Device Relieves Maturing Product Symptoms
DFMA guides IDEXX subassembly redesign, radically reducing parts, weight, assembly time, and cost
http://www.dfma.com/resources/idexx.htm
DESIGN FOR ASSEMBLY: A CRITICAL METHODOLOGY FOR PRODUCT
REENGINEERING AND NEW PRODUCT DEVELOPMENT
MOHAN V . TATIKONDA, CFPIM
Kenan-Flagler Business School, University of North Carolina, Chapel Hill, NC 27599
PRODUCTION AND INVENTORY MANAGEMENT JOURNAL-First Quarter, 1994
http://nptel.ac.in/courses/112101005/20
Videos of Boothroyd Dewhurst Inc.
DFMA Q&A - Design for Assembly
____________________
https://www.youtube.com/watch?v=tJz0HseRHVA
____________________
Assembly of IBM Proprinter, Design for Assembly
____________________
____________________
Boothroyd Dewhurst Inc.
Product Design Efficiency Engineering - Component of Industrial Engineering
Updated 25 July 2017, 13 August 2016, 27 June 2016
Basic DFA Guidelines
Minimise part count by incorporating multiple functions into single parts
Modularise multiple parts into single subassemblies
Assemble in open space, not in confined spaces; never bury important components
Make parts such that it is easy to identify how they should be oriented for insertion
Prefer self-locating parts
Standardise to reduce part variety
Maximise part symmetry
Design in geometric or weight polar properties if nonsymmetric
Eliminate tangly parts
Color code parts that are different but shaped similarly
Prevent nesting of parts; prefer stacked assemblies
Provide orienting features on nonsymmetries
Design the mating features for easy insertion
Provide alignment features
Insert new parts into an assembly from above
Eliminate re-orientation of both parts and assemblies
Eliminate fasteners
Place fasteners away from obstructions; design in fastener access
Deep channels should be sufficiently wide to provide access to fastening tools; eliminate channels if possible
Provide flats for uniform fastening and fastening ease
Ensure sufficient space between fasteners and other features for a fastening tool
Prefer easily handled parts
http://deed.ryerson.ca/~fil/t/dfmdfa.html
http://homepages.cae.wisc.edu/~me349/lecture_notes/me349_dfa_lecture_notes.pdf
Case Studies
http://www.dfma.com/resources/studies.htmMotorola University Teaches Smarter, Faster Product Designs - Laptop DFA
http://www.dfma.com/news/motorola.htm
Boothroyd and Dewhurst’s DFA Software Drives Cost Savings for Motorola's DS9208 Scanner
Presented by: Chris Foley
At the International Forum on Design For Manufacture and Assembly
June 13-15, 2011, Providence, Rhode Island, USA
http://www.dfma.com/resources/motorola.htm
Simplifying Veterinary Device Relieves Maturing Product Symptoms
DFMA guides IDEXX subassembly redesign, radically reducing parts, weight, assembly time, and cost
http://www.dfma.com/resources/idexx.htm
DESIGN FOR ASSEMBLY: A CRITICAL METHODOLOGY FOR PRODUCT
REENGINEERING AND NEW PRODUCT DEVELOPMENT
MOHAN V . TATIKONDA, CFPIM
Kenan-Flagler Business School, University of North Carolina, Chapel Hill, NC 27599
PRODUCTION AND INVENTORY MANAGEMENT JOURNAL-First Quarter, 1994
http://nptel.ac.in/courses/112101005/20
Videos of Boothroyd Dewhurst Inc.
DFMA Q&A - Design for Assembly
____________________
https://www.youtube.com/watch?v=tJz0HseRHVA
____________________
Assembly of IBM Proprinter, Design for Assembly
____________________
____________________
Boothroyd Dewhurst Inc.
Product Design Efficiency Engineering - Component of Industrial Engineering
Updated 25 July 2017, 13 August 2016, 27 June 2016
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