Comparable profits method preferred to cost plus method.
The facts are the same as in Example 5, except that there are significant differences between the controlled and uncontrolled transactions in terms of the types of parts and components manufactured and the complexity of the manufacturing process. The resulting functional differences are likely to materially affect gross profit margins, but it is not possible to identify the specific differences and reliably adjust for their effect on gross profit. Because these functional differences would be reflected in differences in operating expenses, the operating profit measures used under the comparable profits method implicitly reflect to some extent these functional differences. Therefore, because in this case the comparable profits method is less sensitive than the cost plus method to the potentially significant functional differences between the controlled and uncontrolled transactions, the comparable profits method is likely to produce a more reliable measure of an arm’s length result than the cost plus method. See § 1.482-1(c) (Best method rule).