The reliability of the allocation of costs, income, and assets between the relevant business activity and other activities of the tested party or an uncontrolled comparable will affect the reliability of the determination of operating profit and profit level indicators. If it is not possible to allocate costs, income, and assets directly based on factual relationships, a reasonable allocation formula may be used. To the extent direct allocations are not made, the reliability of the results derived from the application of this method is reduced relative to the results of a method that requires fewer allocations of costs, income, and assets. Similarly, the reliability of the results derived from the application of this method is affected by the extent to which it is possible to apply the profit level indicator to the tested party’s financial data that is related solely to the controlled transactions. For example, if the relevant business activity is the assembly of components purchased from both controlled and uncontrolled suppliers, it may not be possible to apply the profit level indicator solely to financial data related to the controlled transactions. In such a case, the reliability of the results derived from the application of this method will be reduced ...