Hi I have recently been given the task by my boss to forecast one of our
key customers monthly usage until monthly until end of 2006,

I am starting with this customers indidual branches monthly usage for
the past 3 years, Some branches will have opened and closed during this
time, And i am looking to be able to predict monthly usage for the next
18 months

Has anyone got any idea's on the best way to forcast within excel, I am
currently using trend (fomulae given to me on this sight) but people are
saying this is not the best way

Exponentionally has been mentioned by a few of my collegues but i have
no idea of the difference between that and linear.

Thanks

Al


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