Development of an application for configuration maintenance.

An iterative procedure was chosen, based on a extensive scope of configuration parameters. First of all the different groups of configuration parameters were identified. A stack-like processing is much more effective than a mask-oriented procedure. Based on this priorization, the development task were assigned to the different iterations. The implementation phase consisted of business logic, GUI, as well the XSL scheme definition. The application based on Microsoft Excel 2003. It is implemented with VBA (Visual Basic for Applications). The import/export interface between the maintenance applicatin and the LIS is file based. XML is used as file format, with validation against a custom defined XSL-Schema.