What are the deciding factors for a scan desgin

If u ask to do DFT implementation on a design, then what factors do we need consider mainly. While doing the DFT implementation designer need to have some knowledge on tester which will be used for testing IC.

  • Number of channels available on the tester
  • Memory size of the channel
  • Number of scan pins
  • The operational frquecny of the tester

This above facotrs must be considered while implementing the DFT on the design