 |
|
|
|
|
|
|
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If
we look down on Derek’s problem from outside, we
|
|
can
see that each day, Derek will respond to around
|
|
40
e‑mails. On some days, it may
be 30 and on some
|
|
50,
but Derek’s average is around 40. We know that
|
|
the average number of e‑mails he responds to remains
|
stable
because the number of e-mails in his in-box
|
|
never
diminishes to 0 or increases to 100.
His 40 per
|
|
day
maintains his in-box.
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|
|
On
Wednesday, some of those e‑mails he responds to
|
|
are
from Monday and Tuesday, but the average
|
|
remains
at 40 per day. “I’m never going to be able to
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|
empty
my in-box,” he laments.
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|
