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Developing ICT solutions
Developing ICT solutions
How can we have a successful project?
feasability study
Formal Data analysis techniques
What will it do?
How will it do it?
Unit test
Integration testing
Functional Testing
Systems testing
User Testing
Operational testing
Conversion
training
ongoing
- Corrective
- Adaptive
- Perfective
Other Examples?
It's useful to have examples that you can remember about failed projects - what's interesting is _why_ they failed
http://u.nu/3z2k4
Computer Weekly, March 2009
A £234m "C-Nomis" IT system for prisons failed in almost every possible way
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Nelson T hornes Textbook
Examples of cancelled or failed UK Government projects
http://u.nu/6x2k4
DWP - £135m on cancelled Benefits Processing Replacement Program
IT Project
Failures blog
http://u.nu/323k4
Department for Transport - £9.2m on cancelled projects
Computer Weekly, December 2007
The cost of failed software projects is estimated to be upwards of $75bn a year (in the US alone)
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Mars Global Surveyor (MGS) spacecraft
Fail.
Systems (development) Life Cycle
Methods:
Questions:
What does the current system do?
What are its strengths and weaknesses?
What is required of a new system?
What constraints are there? e.g. legal
Interviews at all levels of the organisation
Questionnaires
Analysis of paperwork
Observation of the current system
Deliverables
- User Spec
- List of tasks, sub-tasks, timings
- Gantt chart/Critical Path Analysis
- Assessment of user ICT skills
- Hardware & software requirements
- Performance indicators
- Outline solution
Deliverables
Detailed Descriptions
Data capture and validation
Software, tools & techniques used
UI designs
- Details of file definitions, data structures, processes
- Designs of outputs (on screen or paper)
- Test strategy and plan
- Detailed time plan
Outputs
Processing
Testing
Deliverables
- Working System
- Documentation of system
- Draft user guide
Deliverables
- Fully functional system
- sign off by client
- full documentation
- userguide
- technical ducumentation
Deliverables
- Test data and results
- modified user guide
- client approval to install
How?
customise an existing package
writing code