Incremental increase by week when the total for month is known

Redsohare

New Member
Joined
Apr 9, 2014
Messages
1
I have been a long time lurker of MrExcel, but have always been able to find the answer to my question within the forums. However, I am stumped. I am trying to create a pivot table that will show incremental goals by week, when I have a set goal for the month already. However, I don't want to do a straight average across all the weeks in a month. I would like to see it continually grow during the month. How can i mathmatically do that in Excel?

For example:

Jim had 191 sales leads in the last week of the month in December. Of those 191, he closed 29 of them, for a 15.2% close rate. I want to see him raise that by 6% by next December, so (6%/12 (# months) = .5%). He will need to increase his close rate to 15.7% by the end of January. So, for the month of January, we expect 955 sales leads (5*191) and 149.935 (15.7% of 955) closed. However, I don't want to say Week 1, 2, 3, 4, and 5 in January should all have 29.987 closes, I would like to be able to say week 1 = 25, week 2 = 27 week 3 = 30 week 4 = 32 and week 5 = 34, but have that incremental increase to total 149.935.

There is (sadly) no changing the percents, or the closed leads number. These have already been submitted and aproved. I just have to be able to let people see the goals by week now, but if they want to see the monthly goal, it must equal what has been approved.

I am totally at a loss, and pulling my hair out, and I *know* it has to be possible. I just can't wrap my brain around it. I think I've been looking at it too long.
 
Last edited:

Excel Facts

Back into an answer in Excel
Use Data, What-If Analysis, Goal Seek to find the correct input cell value to reach a desired result
If you have an arithmetic progression with N values, total T, and increment i, then the first value needs to be (2T - N (N-1) i) / 2N

e.g. for five values adding to 150 with increment 2 (say), first term is (2x150 - 5x4x2) / (2x5) = 26
and values are 26, 28, 30, 32, 34.

Similarly, for five values adding to 150 with increment 4 (say), first term is (2x150 - 5x4x4) / (2x5) = 22
and values are 22, 26, 30, 34, 38
 
Upvote 0
Not sure I follow but maybe try this...

6%/ 52 weeks = 0.115384615384615% increase/week

So increase the weekly percentage by the above amount.
 
Upvote 0

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