non-functional requirements

The allocation of the development of WEB-applications happens by the department (Business). In general the functional requirements are specified in an appropriate way, because they are within the focus of the department. Non-functional requirements usually are not considered. This causes that important quality criteria is not specified. Therefore the following problems can occure (examples): + Problems with the performance (the site-construction lasts for a long time) + Incompatabilities with the used browser + Poor depiction of mobile devices (e.g. Smartphones) + Lack of agreement according business-hours and maintenance- hours + Lack of applications corresponding to their importance insufficient usability Finally additional costs and clients’ unsatisfaction result.