Select Your Key Idea
After evaluating your options, decide which key idea you’d like to develop further. Remember, you don’t have to choose one exactly as it is. You might combine promising elements from different ideas, adapt features to better suit your end user’s needs, or remove aspects that aren’t practical. Where possible, involve your end user in making the final decision.
Refine Your Design Criteria
With your key idea selected, revisit the initial design criteria you created during Develop Empathy. Add any new criteria that relate to your chosen direction, such as size, weight, ergonomics, aesthetics or cost. You can keep these as a simple list or organise them by importance with the Priority Diagramming method.