I’d say, first, acknowledge that both teams want the same thing—a great product. Now, the key to resolving the clash is to zoom out a bit. Bring both groups into a room, but before diving into usability feedback, start with the users. The product isn’t for the designer’s portfolio or the developer’s code satisfaction—it’s for the user. Shift the conversation from "what do we think" to "what did the user experience?" Then, I’d ask: What’s the data telling us? Let data drive decisions, not egos. If you’re looking at feedback and users are consistently struggling with something, that’s where the focus should go. In short: Focus on the user, follow the data, leave egos at the door.

To resolve conflicts between designers and developers in usability testing feedback: Facilitate collaboration: Encourage open discussion to understand both perspectives. Prioritize user data: Base decisions on user feedback from the tests. Align with project goals: Focus on solutions that meet the project’s objectives. Find compromises: Collaborate to implement solutions that balance design and development needs.

To resolve conflicts between designers and developers during usability testing, it's essential to foster open communication and focus on common goals centered around user experience. Using data from usability tests can help guide discussions and prioritize feedback based on its impact. Encouraging collaborative problem-solving and maintaining a user-centric perspective will keep everyone aligned. By promoting an iterative approach, teams can effectively address usability concerns together, leading to a stronger product overall.

Have an affinity mapping session which involves - Business, Developers, Designers, Marketing team etc. to prioritize the findings. Decide on the criteria by which the team will prioritize the findings. It can be effect of problem on business objectives and UX objectives. Also consider developer LOE while prioritizing the findings. Everyone votes by positioning their sticky notes on to the affinity diagram. Based on this activity, redesign recommendations should me made.