Ban Man Pro
version 2.0 introduced a smoothing algorithm. This
simplifies the management of advertising campaigns allowing
you to distribute impressions evenly over the campaign
flight dates. For example, suppose an advertiser
purchases 30,000 impressions to be spread out over a 30-day
period. Ban Man Pro will now automatically perform
this smoothing provided you enter the distribution as
"Evenly Distributed over Flight Dates".
How does the smoothing
algorithm work? First, you must set the preferences to
define the number of minutes the smoothing algorithm is
based on. Values range from 5 minutes to 60
minutes. Which value you choose depends on how much
traffic your web site experiences and how steady the traffic
is. For high-traffic sites with continuous traffic a
small value works great. For low-volume sites with
erratic traffic a higher value will be required. Here
are some suggested values:
Based on the
smoothing value you select, Ban Man Pro performs the
following tasks. Each hour Ban Man Pro computes the
number of impressions that are expected up to that
hour. This value is then compared to the number of
impressions that have been served. The difference of
these two numbers is the available amount. For
example, suppose Ban Man Pro computes 5,000 expected
impressions, and 4900 have been served. 100
impressions are now available to be served during the next
Next, Ban Man
Pro records the number of impressions that have been served
in each zone during the last XX minutes. (XX is the
value of the smoothing minutes that you have set in your
preferences). Suppose your site is basing the
smoothing algorithm on 15 minutes of data. If 250
impressions were served in the last 15 minutes, Ban Man Pro
predicts that 1000 will be served during the next
hour. With 100 impressions available, Ban man Pro will
set this campaign to serve 10% of the time.
Since the smoothing minutes in this example are set to 15,
Ban Man Pro will re-evaluate these numbers every 15 minutes
and reset the percentages.
During the very
last XX period of the campaign, Ban Man Pro will inflate the
available impressions by 45% in an attempt to insure that
the campaign is fully served. If you traffic
drastically decreases, the campaign may not be fully served.
a new campaign that is to be evenly distributed, they
should always be entered before the start date.
This will ensure the campaign begins immediately at the
start date. Suppose you enter an even campaign at
noon and set the start date to today. Next,
suppose you are expecting to serve 1000 impressions/day
for this campaign. Since 1/2 day has already
passed, Ban Man Pro will attempt to catch up with the
500 expected impressions and that may be the only banner
appearing for some time.
an unrealistic quantity (ie, don't oversell your ad
space). This may cause the smoothing algorithm to
break down and not all campaigns will be served.
In Ban Man
Pro 3 and earlier, the
smoothing algorithm uses application variables to store
all parameters. If Ban Man Pro is shared across
multiple web sites serving ads using SSI or the ASP
Function Call these parameters may not be shared
properly due to the way IIS handles application
variables. If this is the case the even
distribution algorithm will not work properly. The
calls are made to one web site and the application
variables will work properly. Version 4
overcomes this limitation by storing all the statistics
in the database.
Ban Man Pro
version 3 and higher includes an option for analyzing
evenly distributed campaigns. When viewing a
listing of campaigns, click the
button next to the campaign
of interest to view an analysis of the distribution for
this campaign. This will also tell you if the
campaign is over or under-delivering.
NOTE: You must
be using Ban Man Pro version 2.0 or higher to use this functionality.