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
Secant method to do with how "wiggly" the function is on the interval formula_15. For example, if formula_10 is differentiable on that interval and there is a point where formula_17 on the interval, then the algorithm may not converge. The secant method does not require that the root remain bracketed, like the bisection method does, and hence it does not always converge. The false position method (or ) uses the same formula as the secant method. However, it does not apply the formula on formula_18 and formula_19, like the secant method, but on formula_18 and on the last iterate formula_21 such that