Syntax: Log(mean, standard deviation, stream)
The lognormal distribution could be used to model the time required to perform some task when "large" values sometimes occur. It is always skewed to the right and it has a longer right tail than the gamma or Weibull distributions. The lognormal distribution is closely related to the classical normal distribution - see the book Simulation Modeling and Analysis (Third Edition) by Law and Kelton (2000) for details. Furthermore, the parameters of the lognormal distribution, namely, mean and standard deviation, correspond to the lognormal distribution and are not the mean and standard deviation of the corresponding normal distribution. Parameter restrictions are mean > 0.0 and standard deviation > 0.0.
Stream allows you to specify the random number stream for the distribution. There are 215 streams. Stream 1 is the default. See Seeds or Appendix D of the User's Guide for more information.