sometimes known as "froth", which may be confused with the US use of "froth" describing the period before a real estate bubble. The cash flows can be compared to the market-determined equivalent yield, and the property value can be determined by means of a simple model. Note that this method is really a comparison method, since the main variables are determined in the market. In standard U.S. practice, however, the closely related capitalizing of NOI is confounded with the DCF method under the general classification of the income capitalization approach (see above). 3. Residual method. Used for properties ripe for development or redevelopment or for bare land only. The site or unimproved property value is based on the improved or developed value less costs of construction, professional fees, development finance costs and a developer's profit or return on risk. 4. Profit method. Used for trading properties where evidence of rates is slight, such as hotels, restaurants and old-age homes. A three-year average of operating income (derived from the profit and loss or income statement) is capitalized using an appropriate yield. Note that since the variables used are inherent to the property and are not market-derived, therefore unless appropriate adjustments are made, the resulting value will be value-in-use or investment value, not market value. 5. Cost method. Used for land and buildings of special character for which profit figures cannot be obtained or land and buildings for which there is no market because of their public service or heritage characteristics. Both the residual method and the cost method would be grouped in the United States under the cost approach (see above). Under the current RICS Valuation Standards, the following bases of value are recognized: Market value (see PS 3.2); Market rent (see PS 3.3); Worth (investment value) (see PS 3.4); and Fair value (see PS 3.5) Practice in the UK The common public experience of chartered surveyors is in the process of obtaining a mortgage loan. A mortgage valuation will be required by any mortgage lender as a condition of obtaining a mortgage loan. The homebuyer may take the option to instruct the same surveyor to carry out a "RICS HomeBuyer Report" or a "RICS Building Survey" (sometimes called a "Structural Survey"), usually at additional cost. When the surveyor is instructed in this combined role, the mortgage valuation is still produced for the lender, and the HomeBuyer Report or Building Survey