Applying product line concepts in small and medium-sized companies

Small and medium-sized enterprises work under heavy constraints: They need to be very flexible and fast in their reaction to customer requests, thus l imiting their possibility for long-term planning. In a partially publicly f unded project, the authors have started to apply their Product Line Softwar e Engineering method developed at Fraunhofer IESE, in six small and medium- sized companies addressing six different domains. The article presents firs t experience and lessons learned from 24 months of project work; including first results within the companies.