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
Billings ovulation method with the development of the Billings ovulation method. Billings ovulation method The Billings ovulation method is a method in which women use their vaginal mucous to determine their fertility. It does not rely on the presence of ovulation, rather it identifies patterns of potential fertility and obvious infertility within the cycle, whatever its length. Effectiveness, however, is not very clear. Evidence of effectiveness is not very clear. Typical use of this method is associated with a pregnancy rate of 1 to 22%. A World Health Organization study found that 15% is caused by a conscious departure from method rules. The