Expertise or Fit
Expertise: what has been done so far?
Library and showroom methods help you to build upon the work and knowledge of others. Theoretical rigor, guidance and insights in existing work help you to innovate deliberately. Make sure you have mobilized the right and sufficient expertise in your project.
Fit: what is needed?
The empirical methods in Field and Lab focus on the application context. They support you to come up with solutions that are relevant and meaningful and work smoothly. You need to make sure your result is a perfect fit for the target situation.