derived from requirements and therefore are useful in methods such as estimation by proxy. Criticism Albrecht observed in his research that Function Points were highly correlated to lines of code, which has resulted in a questioning of the value of such a measure if a more objective measure, namely counting lines of code, is available. In addition, there have been multiple attempts to address perceived shortcomings with the measure by augmenting the counting regimen. Others have offered solutions to circumvent the challenges by developing alternative methods which create a proxy for the amount of functionality delivered. See also COCOMO (Constructive Cost Model) Comparison of development estimation software Mark II method Object point Software development effort estimation Software Sizing Source lines of code Use Case Points The Simple Function Point method References External links The International Function Point Users Group (IFPUG) Software metrics Software engineering costs pt:Ponto de função