Performance prediction method for Web-access response time distribution using formula

Since there are many causes that can affect Web response time, it is difficult to predict. NetForecast Inc. has proposed a formula to calculate the response time of an application over the TCP/IP layer. This paper proposes a method to generate a probability function for the response time by using NetForecast´s formula. This calculation method uses two input parameters: the file-size cumulative distribution function (CDF) and the delay probability density function (PDF). In the formula, the data sampled from the file-size CDF is input as the payload-length parameter, and the data sampled from the delay PDF is input as the round-trip delay parameter. Processing these parameters using the performance prediction method, we can generate the response-time CDF.