Many methodologies appeared in the latest years to deal with multi-agent systems complexity and special development requirements. Each methodology focuses in certain aspects of multi-agent systems development and use different case studies to prove their effectiveness. In order to compare their characteristics it is necessary to use a single case study that requires a complex and distributed solution. This paper presents the development of a very well-known multi-agent systems case study – the Conference Management System – with the Multi-agent Systems Unified Process (MASUP).