At each reporting date non-financial assets not carried at fair value, like goodwill and plant, property and equipment, are reviewed to determine whether there is an indication that an asset may be impaired. If there is an indication of possible impairment, the recoverable amount of any asset or group of related assets, which is the higher of value in use and the fair value less cost to sell, is estimated and compared with its carrying amount. If the recoverable amount is lower, the carrying amount of the asset is reduced to its recoverable amount and an impairment loss is recognised immediately in profit or loss.
Inventories are also assessed for impairment at each reporting date. The carrying amount of each item of inventory, or group of similar items, is compared with its selling price less costs to complete and sell. If an item of inventory or group of similar items is impaired, its carrying amount is reduced to selling price less costs to complete and sell, and an impairment loss is recognised immediately in profit or loss.
If an impairment loss is subsequently reversed, the carrying amount of the asset or group of related assets is increased to the revised estimate of its recoverable amount, but not to exceed the mount that would have been determined had no impairment loss been recognised for the asset or group of related assets in prior periods. A reversal of an impairment loss is recognised immediately in profit or loss.