Product software implementation method result in ambiguity when questions arise in the execution of the implementation process. On the other hand methods can be used as a profession, meaning that the method should be taken strict and the usage of the method should be a profession, instead of a guiding principle. This view is very useful if the implementation process is very complex and is very dependent on exact and precise acting. Organizational and quality management will embrace this view, as a strict usage of any method results in more clarity on organizational level. Change management however might indicate that more flexibility in an
Delta method as which implies the variance of "h(B)" is approximately One can use the mean value theorem (for real-valued functions of many variables) to see that this does not rely on taking first order approximation. The delta method therefore implies that or in univariate terms, Suppose "X" is Binomial with parameters formula_21 and "n". Since we can apply the Delta method with to see Hence, even though for any finite "n", the variance of formula_24 does not actually exist (since "X" can be zero), the asymptotic variance of formula_25 does exist and is equal to Note that since "p>0", formula_27 as