Hello
and
welcome to the familycomputerclub.com!
I've received many emails lately about how to use solver
in Excel.
Let's take an example of a training institute. Depending on the number
of students per month and the average fees that it charges, we can
calculate the annual income. Similarly we can compute the annual
expenses. Now the annual profit before taxes and depreciation will be
equal to the income minus the expenses. The institute owner is not
happy. He wishes his income to be 1000000. To do that he has to get
more students and/or decrease his expenses. Of course, he cannot have
unlimited number of students and he cannot reduce his expenses to zero.
So he has to work within certain constraints. Using these details we
can ask solver to provide a solution.
So our target cell is the profit in cell b3.
Our profit dpends on the number of students in cells e3 to e14. They
cannot be unlimited and they cannot be fractions. Our profit also
depends on the fees that we charge and we cannot charge what we like
but as per market conditions. The average fee is in cells F3 to F15.
Our profit also depend on how we control our expenses. Here also we
face constraints. So we can reduce our expenses only upto to a certain
extent.
Therefore we need to provide Solver with some constraints so that it
can help us to find a good solution.
Now let's see how we can solve the problem and learn how to use the
basics of Solver in Excel.
Click on data tab and from the Analysis area we then
select
Solver
In the dialog box our target cell is B3 which
represents
the profit. We wish to set it to 10000000. If we set it to 0 we can
calculate the breakeven.
In the changing cells we select the average fees
(F15),
K3:K14 represents the total monthly expenses, E3:E14 represents the
number of students
and J3:J14 represents the other expenses which forms the part of the
total expenses. Now these cells are related to the income and expenses
which when changed influence the amount of profit made.
Finally we add our constraints. For example our
students
cannot be fractions and therefore they are defined as integers. Our
other expenses cannot be less than 13500 but also not more than 15000
and so on.
Finally we click on "Solve' to learn whether Solver
finds a
solution.
Watch the video below tp learn about the feature (about 36 MB):