Bullseye is designed to be a straightforward way to direct your traction focus and maximize your results.
First and foremost, it forces you to take all the traction channels more seriously than you would otherwise. This is accomplished via the brainstorm step and then again by forcing you to think about all of the channels through the rank and prioritize steps. These steps systematically uncover strategies for getting traction that you wouldn't have found using other approaches.
The framework is also meant to help you zoom in on the best ideas as quickly and cheaply as possible, while still casting a wide net: hence the Bullseye metaphor.
Third, we emphasize doing tests in parallel since the traction channel that will ultimately succeed is unpredictable, and time is of the essence.