[beat]

Thanks for the reply. I'm working on a product that directly addresses the time lost to emergency failures in complex system, so I'm hoping to find a way to get a decent measurement of how the engineers doing the work perceive the loss.

If I can put it in reasonably defensible numeric terms for the managers/directors who can purchase software ("I can save 5% of the time of your senior/lead engineers!"), it'll be much easier to sell.