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The output for our Commute Time 1 VBA example consists of:
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Iterations Processed
(D44), with a % calculation (worksheet-based) to the right (E44)
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A cumulative histogram chart
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A summary data table (C57 - F93) which receives
the output of the VBA array
This provides an example of combining worksheet
functions with VBA code in an integrated way. If we know, for instance,
that our desired final product is a cumulative histogram, we can build our VBA
function in such a way that the output lends itself easily to that endpoint.
The code for this example executes relatively quickly. However, if we wish
to change the model - for instance, changing the way in which the drive time for
a particular segment is calculated, or adding a fourth variable (or segment) -
this would entail editing VBA code. This can be more cumbersome than
making changes to a worksheet-based model, and may run a higher risk of
introducing errors.
Our next example will highlight a different method of modeling the same problem
with a hybrid approach, relying more heavily on the worksheet than on
the VBA code.
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