How does the revaluation model differ from the cost model?

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With the revaluation model, no depreciation is taken, but impairment must still be considered.

With the revaluation model, the asset is measured at fair value $($not at cost$)$ less depreciation and impairments.

With the revaluation model, depreciation is taken, but impairment is not considered.

With the revaluation model, the asset is measured at fair value $($not at cost$)$ with no deductions for depreciation or impairments.