I attended a webinar by Realization and after the session, they sent a link to this video they commissioned on multitasking. Rather than being an academic description, it is told from the perspective of a design engineer who was lost in the world of multitasking - it took him four weeks to do a 2-4 day design task. Take a look. The last ~30 seconds hints at the tools from Realization that helped him (and his team) reduce multitasking.
The video appears to be available directly on Realization's website too.