Individual In-Depth Interviews vs Co-Designing Workshop

In my current project, we have scheduled a Usability Testing component using the Individual In-Depth Interviews (IDIs) method.

Due to unforeseen circumstances, the project has to be delayed. I'm wondering if we can substitute to having a Co-Designing Workshop rather than IDIs as we do not wish to extend the delay even more.

Here are my considerations:

Usability Testing

  • We have around 4-5 modules which requires different participants
  • In total, we will need to test with roughly 20-25 participants
  • It will take least a month's time to complete it
  • However IDIs will help us to identify navigation problems as well as jarring UI issues

Co-Designing Workshop

  • We will bring together at least 5 users of each module(each module 1 session)
  • At most, this will take less than 2 weeks
  • We will print out the designed wireframes and paste around the room and get users to discuss/work on it to validate the content
  • However, users will not be able to navigate around the system hence I'm worried we might run into usability issues. But they are able to validate the content (e.g. form fields, information, statuses etc)

Let me know if it's a good idea/possible to make such arrangements. Thank you!