Lean Blog Audio — “ER wait times down, but only slightly” ??

http://leanblog.org/audio258

“ER wait times down, but only slightly” or ER wait times are virtually the same?

This article was sent by a friend and blog reader from Winnipeg the
other day:

“ER wait times down, but only slightly”

Oh good, the waiting times are down. But what does “only slightly”
mean? Have ER wait times gone down in a meaningful way? Or are they
just comparing two data points? Is this “down” a signal or is it just
noise in the system? These are the types of questions that can be
answered by methods in my new book Measures of Success: React Less,
Lead Better, Improve More

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