Plat assets are Tangible assets used in the operation of business that have a useful period. Current assets. Held for sale. Intangible assets used in the operations of a business that have a useful accounting period. Tangible assets used in the operation of business that have a useful period. Depreciation: Measures the decline in market value of an asset. Measures physical deterioration of an asset. Is the process of allocating to expense the cost of a plant asset. Is an outflow of cash from the use of a plant asset