Using the rational entity impairment model $($IFRS$),$ an impairment loss is the excess of the carrying amount of an asset over its recoverable amount. The recoverable amount is defined as

the higher of its carrying value and its fair value less costs to sell.

the higher of its book value and its expected future net cash flows.

the higher of its value in use and its fair value less costs to sell.

the higher of its current and present value of expected future net cash flows.