A method for assigning tenants of users to offering instances of an application or middleware includes representing a set of offerings as respective offering instances of the application or middleware available from a server, determining server resource capacity of the server, representing constraints associated with the tenants and the offering instances, generating a mapping of the tenants to the offering instances based on the server resource capacity and constraints, and assigning a tenant to an offering instance according to the mapping, wherein the offering instance is made accessible to the users of the assigned tenant.