Valuation is the process of determining the monetary worth of property rights at a specific date. It requires applying logical principles and tested methods to estimate value given the circumstances. Valuation is both a science and an art. It differs from cost, which is the amount required to produce or acquire goods/services, and price, which is the amount paid for goods/services. The four pillars of value are utility, demand, transferability, and scarcity. Valuation is used for various purposes like sale/purchase of property, taxation, security for loans, and insurance. Historical cost refers to the original price paid for an asset, while current cost is the asset's fair market value today.