---
abstract: 'CDIS is a commercial air traffic information system that was developed using formal methods 15 years ago by Praxis, and it is still in operation today. This system is an example of an industrial scale system that has been developed using formal methods. In particular, the functional requirements of the system were specified using VVSL -- a variant of VDM. A subset of the original specification has been chosen to be reconstructed on the Rodin platform based on the new Event-B formalism. The goal of our reconstruction was to overcome three key difficulties of the original formalisation, namely the difficulty of comprehending the original specification, the lack of any mechanical proof of the consistency of the specification and the difficulty of dealing with distribution and atomicity refinement. In this paper we elucidate how a new formal notation and tool can help to overcome these difficulties.'
accompaniment: []
book_title: ~
commentary: ~
completion_time: ~
composition_type: ~
conductors_id: []
conductors_name: []
contact_email: ~
copyright_holders: []
corp_creators: []
creators_id: []
creators_name:
  - family: Rezazadeh
    given: Abdolbaghi
    honourific: ''
    lineage: ''
  - family: Butler
    given: Michael
    honourific: ''
    lineage: ''
  - family: Evans
    given: Neil
    honourific: ''
    lineage: ''
data_type: ~
date: 2007-12-17
date_type: ~
datestamp: 2008-01-07 11:30:06
department: ~
dir: disk0/00/00/00/09
divisions: []
edit_lock_since: ~
edit_lock_until: ~
edit_lock_user: ~
editors_id: []
editors_name: []
eprint_status: archive
eprintid: 9
event_dates: ~
event_location: London
event_title: 'BCS-FACS Christmas 2007 Meeting - Formal Methods In Industry'
event_type: workshop
exhibitors_id: []
exhibitors_name: []
fileinfo: /style/images/fileicons/application_zip.png;/9/2/CDIS%2D19%2DNOV%2D07.zip|/style/images/fileicons/application_pdf.png;/9/1/Redevelopment_of_an_Industrial_Case_Study_Using_Event%2DB_and_Rodin.pdf
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: 2010-04-19 15:05:49
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: 62
series: ~
skill_areas: []
source: ~
status_changed: 2008-01-07 11:30:06
subjects:
  - deploy_industrial_other
  - Refinement
  - examples
succeeds: ~
suggestions: ~
sword_depositor: ~
sword_slug: ~
task_purpose: ~
thesis_type: ~
title: Redevelopment of an Industrial Case Study Using Event-B and Rodin
type: rodin_archive
userid: 1
volume: ~
<script src='//archive-bar.soton.ac.uk/archive-bar.js'></script>