A valuation methodology that compares public and private companies in terms of a ratio of value to an operations figure such as revenue or net income. For example, if several publicly traded computer hardware companies are valued at approximately 2 times revenues, then it is reasonable to assume that a startup computer hardware company that is growing fast has the potential to achieve a valuation of 2 times its revenues. Before the startup issues its IPO, it will likely be valued at less than 2 times revenue because of the lack of liquidity of its shares.