Timing Is Everything

by Don Friedman on January 29, 2016

Marieta pointed out yesterday that as long as I’m talking about crack monitors, I need to discuss their biggest failing: they depend on us to be installed and reviewed.

OLYMPUS DIGITAL CAMERA

Notice how the crack is much wider than the distance shown on the monitor? If the crack monitors are installed after a severe event (in this case, movement from adjacent construction) then they may well she no movement or, as here, very little. That’s not meaningless: the issue of whether movement is ongoing or a one-time event is a serious one and data that addresses it is useful. It’s just not as useful as data that records all of the movement.

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