hi there, 

I am writing a business plan for a company developing products for the
home improvement industry (also known to be called DIY market)

The business plan holds 5 year financial forecast. So I have to
estimate revenue 5 years ahead?

Now, I take this task very seriously and though I know that some
people will make up numbers and get along with that, I think that in
the long run it is the wrong thing to do.

There fore I want to make my predictions as accurate as possible. (I
am aware that at the end of the day we are guessing here but I am
looking to do a clever guess)

What I thought of doing is building a map of potential clients which
sort them into groups
(e.g. Lowe?s and home depot group number 1, group number 2 is ?. Etc)
by various parameters (revenue, market share, number of stores type of
customers,  core business etc)  and then approaching each group and
asking the vital question of how many clients will I be able to draw
from a group and in how much they will buy from me in the next five
years.

This way I will be able to show how I reach say $10M in year five. 

Now this is the exact info I am looking for  - maybe someone already
did such kind of industry mapping. Or if not perhaps I can found one
or few places that all the data about players in the market is in.

Please do not send me to general industry web sites unless you are
confidenent it contains such data. I rather think
the answer is in some kind of business plan for the same type of
business that someone loaded up to the internet.

Another possible good answer would be a one that would suggest an
alternative method for assessing revenues in such a market and showing
the build up of it. (ie  not just XX market share)

please note that home improvement industry is spread over 4 type of
channels  - home center and hardware operators chains
discount stores
general departments stores
wholeslalers

good answer must take thaem all in account.

thanks,
amdoit-ga