The Open University since 2006
Alternatively you can skip the navigation by pressing 'Enter'.
Inside The Commons: Reinventing The HouseSaturday, 22nd October 2016 17:30 - BBC Two (Scotland only)In the final part of this major four-part series, battles break out over the future of the House. Read more: Inside The Commons: Reinventing The House
The Bottom Line: Autumn 2016: Activist investorsSaturday, 22nd October 2016 17:30 - BBC Radio 4
Inside The Commons: Reinventing The HouseSaturday, 22nd October 2016 18:00 - BBC Two (England only)
Sleuths, Spies & Sorcerers: Andrew Marr’s Paperback Heroes: FantasyMonday, 24th October 2016 21:00 - BBC Four
BBC Inside Science - 2016/2017 series: Lithium Batteries, HCFCs, Cell Mapping and Hunting DogsAvailable for over a yearThis week’s Inside Science looks at what we demand from batteries and plans for a human cell atlas. Read more: BBC Inside Science - 2016/2017 series: Lithium Batteries, HCFCs, Cell Mapping and Hunting Dogs
The Bottom Line: Autumn 2016: Activist investorsAvailable for over a year
Sleuths, Spies & Sorcerers: Andrew Marr’s Paperback Heroes: DetectivesAvailable until Friday, 18th November 2016 22:00
Methods in Motion: Remaking self-helpDr Meg-John Barker discusses how new ways of thinking can be linked to new forms of investigation Read more: Methods in Motion: Remaking self-help
Take the photographic memory testCan you capture scenes just by looking at them? Find out with our photographic memory test. Launch now: Take the photographic memory test
Liquidity managementIn this free course you will focus on liquidity management, one of the fundamental aspects... Try: Liquidity management now
Introduction to bookkeeping and accountingLearn about the essential numerical skills required for accounting and bookkeeping. This free... Try: Introduction to bookkeeping and accounting now
How do you model a software system? This free course, Modelling object-oriented software an introduction, will help you to work through the processes necessary to produce a conceptual model, by analysing the requirements document to identify classes and associations appropriate for modelling the system domain, together with their respective attributes and multiplicities.
After studying this course, you should be able to:
- list the components that make up a conceptual model of a system domain, and describe briefly the form and purpose of each component
- explain why a conceptual model forms the basis for modelling the structure of the system, i.e. gives an initial structural model of the system
- use various techniques and guidelines to identify an appropriate set of classes and associations from a requirements document, including their attributes and multiplicities
- identify situations where a generalisation relationship between classes exists, and decide on appropriate parent and child classes, and their attributes and associations.
- identify and reason about derived attributes and associations.
- Current section: Introduction
- Learning outcomes
- 1 Introduction
- 2 Developing the conceptual model
- 3 Classes
- 3.1 Terminology and notation
- 3.2 Identifying classes and attributes
- 3.3 Identifying classes and attributes for the Hospital System
- 3.4 Generalisation relationships
- 3.5 Abstract classes
- 3.6 Class or attribute?
- 4 Associations
- 5 Modelling events
- 6 Invariants
- 6.1 What is an invariant?
- 6.2 Remaining invariants for the Hospital System
- 7 Derived attributes and associations
- 8 Conceptual models
- 9 Conclusion
- Keep on learning
Study this free course
Enrol to access the full course, get recognition for the skills you learn, track your progress and on completion gain a statement of participation to demonstrate your learning to others. Make your learning visible!
Modelling object-oriented software – an introduction
This material introduces the first steps in modelling a software system. Software development is made up of phases, which are often organised into cycles. The first of these phases is requirements specification. In this particular course you will explore how to analyse the requirements document (the output from the requirements specification phase) to arrive at an understanding of how the proposed software system will be structured.
This OpenLearn course is an adapted extract from the Open University course.
Copyright & revisions
Originally published: Friday, 29th July 2011
Last updated on: Monday, 22nd February 2016
- Creative-Commons: The Open University is proud to release this free course under a Creative Commons licence. However, any third-party materials featured within it are used with permission and are not ours to give away. These materials are not subject to the Creative Commons licence. See terms and conditions. Full details can be found in the Acknowledgements and our FAQs section.
- This site has Copy Reuse Tracking enabled - see our FAQs for more information.
If you enjoyed this, why not follow a feed to find out when we have new things like it? Choose an RSS feed from the list below. (Don't know what to do with RSS feeds?)
Remember, you can also make your own, personal feed by combining tags from around OpenLearn.
All our alternative formats are free for you to download, for more information about the different formats we offer please see our FAQs. The most frequently used are Word (for accessibility), PDF (for print) and ePub and Kindle to download to eReaders*.
- Word (2.4 MB)
- PDF (2.6 MB)
- ePub 3.0 (1.4 MB)
- ePub 2.0 (1.4 MB)
- Kindle (947 KB)
- RSS (894 KB)
- HTML (1.4 MB)
- SCORM (1.4 MB)
- OUXML Package (61 KB)
- OUXML File (449 KB)
- IMS Common cartridge
*Please note you will need an ePub and Mobi reader for these formats.