Momm, ChristofKrebs, RouvenReussner, RalfPretschner, AlexanderJähnichen, Stefan2019-01-172019-01-172011978-3-88579-278-9https://dl.gi.de/handle/20.500.12116/19882The upcoming business model of providing software as a service (SaaS) not only creates new challenges for service providers but also for software engineers. To enable a cost-efficient service management, the hosted application should support multi-tenancy. For implementing multi-tenancy, several options are available, whereas all of them to a certain degree require a reengineering of the application at hand. Since for many applications this represents the next big evolution step, this paper is devoted to discussing different options for implementing multi-tenancy regarding the initial reengineering effort required for meeting the customer expectations versus cost-saving potential.enText/Conference Paper1617-5468