Problem: Sleep Deprivation. Solution: It Depends

Sleep deprivation does look to be a very serious problem in the workplace, as it's costing companies $63.2 billion in lost productivity among its sleepy workers, according to Harvard Medical School. This article - Go Ahead, Hit the Snooze Button - does a good job of describing the organizational impact of sleep deprivation and companies' responses.  The figures are staggering, indeed.  

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But, at the same time, it's terribly incomplete. In what way? It covers very little, if at all, of the nature and causes of sleep deprivation. To implement a costly and time-consuming solution, companies ought to be certain that they've fully understood why their workers are sleep-deprived and that their solutions are indeed targeted to their varied reasons.