15. [Impairment] Roche, in its report for the half-year ended June 30, 2000, adopted IAS 36 (Impairment), with the following disclosure "Impairment of assets. When the recoverable amount of an asset, being the higher of its net selling price and its value in use, is less than its carrying amount, then the car- rying amount is reduced to its recoverable value. This re-duction is reported as an impairment loss. Value in use is calculated using estimated cash flows, generally over a five-year period, with extrapolating projections for subse- quent years. These are discounted using an appropriate long-term interest rate. Previously the permitted alterna- tive method for calculating value in use was applied. whereby it was calculated using cash flow projections on an undiscounted basis. As a result, the Group recognized impairment charges of 1.161 million Swiss francs relating to acquired intangi- ble assets.