--- abstract: "The main destination of this paper is the industrial milieu. We are concerned with the difficulties encountered by industrial developers who are willing to apply \"new\" approaches to software engineering (since they always face the same problem for years: how to develop safe software) but are in fact disappointed by what is proposed to them. We try to characterize what the relevant constraints of industrial software projects are and then propose a simple methodology able to face the real problem. It is based on the usage of Event-B and is \r\nillustrated by means of an industrial project. \r\n" accompaniment: [] book_title: ~ commentary: ~ completion_time: ~ composition_type: ~ conductors_id: [] conductors_name: [] contact_email: ~ copyright_holders: [] corp_creators: [] creators_id: [] creators_name: - family: Su given: Wen honourific: '' lineage: '' - family: Abrial given: Jean-Raymond honourific: '' lineage: '' - family: Huang given: Runlei honourific: '' lineage: '' - family: Zhu given: Huibiao honourific: '' lineage: '' data_type: ~ date: 2011 date_type: ~ datestamp: 2011-07-21 09:47:15 department: ~ dir: disk0/00/00/03/16 divisions: [] edit_lock_since: ~ edit_lock_until: 0 edit_lock_user: ~ editors_id: [] editors_name: [] eprint_status: archive eprintid: 316 event_dates: ~ event_location: 'Durham, UK' event_title: ICFEM 2011 event_type: conference exhibitors_id: [] exhibitors_name: [] fileinfo: /style/images/fileicons/application_pdf.png;/316/1/Modes_version_55.pdf|/style/images/fileicons/application_zip.png;/316/4/modes.zip full_text_status: public funders: [] id_number: ~ importid: ~ institution: ~ isbn: ~ ispublished: inpress 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: 2011-07-21 09:57:08 latitude: ~ learning_level: ~ longitude: ~ lyricists_id: [] lyricists_name: [] metadata_visibility: show monograph_type: ~ note: ~ num_pieces: ~ number: ~ official_url: ~ output_media: ~ pagerange: ~ pages: ~ patent_applicant: ~ pedagogic_type: ~ place_of_pub: ~ pres_type: paper producers_id: [] producers_name: [] projects: [] publication: ~ publisher: ~ refereed: TRUE referencetext: ~ related_url_type: [] related_url_url: [] relation_type: [] relation_uri: [] rev_number: 34 series: ~ skill_areas: [] source: ~ status_changed: 2011-07-21 09:47:15 subjects: - deploy_method_reqevo succeeds: ~ suggestions: ~ sword_depositor: ~ sword_slug: ~ task_purpose: ~ thesis_type: ~ title: 'From Requirements to Development: Methodology and Example ' type: conference_item userid: 1 volume: ~