MEP EP#295: Design For Everything

MEP EP#295: Design For Everything

The DFs

• DFA - Design for Assembly


• DFC - Design for Conservation


• DFD - Design for Documentation


• DFM - Design for Manufacturing


• DFP - Design for Production


• DFR - Design for Repair / Recycle


• DFT - Design for Test


• DFS - Design for Safety

How to DFX

• Identify what you are Designing For
  
  
  
  
  • Perhaps list them based on priority
  
  
  • Make a list of all of the items
  
  
  • Make a timeline for which DF applies when in the product life
  
  
  
  


• Create a list of key design criteria
  
  
  • This will vary based on where the product is in the design cycle
  
  
  
  


• Schedule specific focused time to have a team review the DF
  
  
  • Have the main designer present, but it is best to have other perform the DF checks
  
  
  
  


• Have a sign off and circle back process
  
  
  • If it passes then have the team sign off and move to the next stage
  
  
  • If it fails, have a process of fixing and asses if another full DF meeting is needed
  
  
  • Perhaps just a small DF meeting to address one thing
  
  
  
  


• At then end of the product design cycle you will have a folder of completed design checks that help validate the release of the product

DFA vs DFM vs DFP

Techniques for making revisions easier

• Put circuits that you know need adjustment where you can reach them with a soldering iron or a probe


• 0 ohm resistors
  
  
  • Make for very easy configuration changes
  
  
  
  


• DNI/DNP - lots of people don't know this is a thing


• Multiple footprints


• Parallel components


• Room for soldering!


• Test points - different from component terminations


• Keep lists of things to remove for production