Shortrun production function
The shortrun production function: An example
The
following table is based on a simple production function of a maize
farmer. The units of land, which are shown in the first column,
constitute the
fixed input, while the units of labour, shown in the second column, constitute the variable input. In column three the total output (in tons), also
called the total product (TP), shows the maximum quantities of output (in
tons) that can be produced with the various combinations of fixed inputs and
variable inputs. According to the table, if one unit of labour is
employed, the total product is equal to 16 tons of maize. Employing
two units of labour the total product is 44 tons, three units of labour
produces
78 tons of maize, etcetera.
This simple production function can also be
represented with the aid of a graph. The units
of labour are measured on the horizontal axis while the total
product is measured on the vertical axis. By
clicking on the units of labour one can see the corresponding point on the
production function. 

A range where the total product increases at an increasing
rate, a range where the total product increases at a diminishing
rate, a range where the total product is unchanged and then begins
to decline,
can be distinguished. (more) 
