
366 • Big Data Analytics
it is likely that no salesman could sustain sales as before. e requirements
for drawing valid conclusions from traditional big data systems apply
equally to results found in discovery.
ere may be economic changes that aect the Midwest dierently
than other regions. ere may be problems with a salesman not doing
his job properly. ere may be a concerted marketing eort by a new
competitor centered in that region that is eating into sales. A key cli-
ent may have moved its headquarters westward, driving sales from the
Midwest sales region to the Rocky Mountain sales region. To understand
what is happening and why it is ...