It is the difference between the cost of the components or materials or

hours actually used in production and the cost of the components or materials or

hours that should have been used.

The difference between the number of units actually produced and the

number of units that should have been produced.

This is the difference between the breakdown of sales actually achieved

and the breakdown of sales that had been forecast in the budget.

It is the difference between the number of components

or materials or hours actually used in production and the number of components

or materials or hours that should have been used.