Originally a computerized method of estimating large numbers of property values in an efficient,if not entirely accurate,manner;frequently used by tax appraisers to periodically reappraise properties for purposes of real estate taxes. A disgruntled property owner may appeal the valuation and present evidence the computer made a mistake in that particular instance. Today, AVM artificial intelligence has progressed to the level of respectability that lenders use it to appraise property for mortgage loan purposes and the IRS uses it to evaluate a taxpayer's assets.