The Cost of not paying attention : how interruptions impact knowledge worker productivity [online]

Authors: Jonathan B. Spira & Joshua B. Feintuch

"Interruptions now consume 28% of the knowledge worker's day ... this translates into 28 billion lost man-hours per annum to companies in the United States alone. ... It would be an understatement to say that attention management - the area of management science dealing with interruptions - merits immediate attention." - page 4.