--- abstract: 'Visualizing graphs with a large number of edges and vertices can be cumbersome and ineffective. This is due to the presence of countless overlapping arrows, which makes a graph unclear and hard to understand and interpret by a human. The aim of this paper is to try to address this problem using a new concept of data visualization, namely pie tree visualization. We illustrate this technique on the module architecture of a real-life development from the project Deploy. We first describe pie tree visualization, and then, present its advantages.' accompaniment: [] book_title: Proceedings SEKE 2009 commentary: ~ completion_time: ~ composition_type: ~ conductors_id: [] conductors_name: [] contact_email: ~ copyright_holders: [] corp_creators: [] creators_id: - ~ - leuschel@cs.uni-duesseldorf.de creators_name: - family: Samia given: Mireille honourific: '' lineage: '' - family: Leuschel given: Michael honourific: '' lineage: '' data_type: ~ date: 2009-07 date_type: ~ datestamp: 2009-09-09 07:52:36 department: ~ dir: disk0/00/00/01/48 divisions: [] edit_lock_since: ~ edit_lock_until: ~ edit_lock_user: ~ editors_id: [] editors_name: [] eprint_status: archive eprintid: 148 event_dates: ~ event_location: ~ event_title: ~ event_type: ~ exhibitors_id: [] exhibitors_name: [] fileinfo: /style/images/fileicons/application_pdf.png;/148/1/seke09_jcre.pdf full_text_status: restricted funders: [] id_number: ~ importid: ~ institution: ~ isbn: ~ ispublished: pub issn: ~ item_issues_comment: [] item_issues_count: 0 item_issues_description: [] item_issues_id: [] item_issues_reported_by: [] item_issues_resolved_by: [] item_issues_status: [] item_issues_timestamp: [] item_issues_type: [] keywords: ~ lastmod: 2010-04-19 15:05:57 latitude: ~ learning_level: ~ longitude: ~ lyricists_id: [] lyricists_name: [] metadata_visibility: show monograph_type: ~ note: ~ num_pieces: ~ number: ~ official_url: ~ output_media: ~ pagerange: 400-405 pages: ~ patent_applicant: ~ pedagogic_type: ~ place_of_pub: ~ pres_type: ~ producers_id: [] producers_name: [] projects: [] publication: ~ publisher: Knowledge Systems Institute Graduate School refereed: TRUE referencetext: ~ related_url_type: [] related_url_url: [] relation_type: [] relation_uri: [] rev_number: 20 series: ~ skill_areas: [] source: ~ status_changed: 2009-09-09 07:52:36 subjects: - deploy_tooldev_other - deploy_industrial_trans succeeds: ~ suggestions: ~ sword_depositor: ~ sword_slug: ~ task_purpose: ~ thesis_type: ~ title: Pie Tree Visualization type: book_section userid: 12 volume: ~