1. A method of providing formalized Information Technology (IT) business decision making, the method comprising: determining, on a processor of a computer, a relationship between at least one Information Technology (IT) environmental element and at least two Information Technology (IT) performance metrics; determining a business value based on said relationship between said at least one Information Technology (IT) environmental element and said at least two Information Technology (IT) performance metrics to optimize an Information Technology (IT) business decision based on at least one predetermined business objective, wherein said at least one predetermined business objective is based on a set of system constraints, and wherein said at least two Information Technology (IT) performance metrics are selected from the group consisting of efficiency, robustness of Information Technology (IT) environment, enhancement of employee productivity, and Information Technology (IT) effectiveness; and optimizing on the processor of the computer, based on said at least one predetermined business objective, said Information Technology (IT) business decision using said business value, wherein said optimizing incorporates uncertainty concerning the relationship between said at least one Information Technology (IT) environmental element and said at least two Information Technology (IT) performance metrics through a random error component, wherein said random error component enters the relationship as: 
 Y j =G ( x 1 ,. .. , x n )+ε j wherein G represents a relationship between one of said at least two Information Technology IT performance metrics and one of said at least one Information Technology IT environmental element and x represents a decision variable, and wherein optimizing said Information Technology (IT) business decision comprises stochastic optimization.