IS Development

1
IS Development

• pre-requisite knowledge
• a concept of an information system
• the systems development lifecycle
• This subject

problem budget, time, etc
IS Development
Existing Information system
new Information system
Client/Users
2
An information system?
customers
Other systems
?
internet
Legal requirements
Government regulations
Other Organizations and departments
clients
3
An information system?
control and feedback
Change or Transformation (processing')
information' something useful
Data something to be processed
storage
4
The development lifecycle?

• 1. Systems Planning (other commonly used names
  are Preliminary Investigation, Feasability Study)
  
• 2. Systems Analysis (Requirements
  Determination)
• 3. Systems Design
• 4. Systems Implementation (Systems Development,
  Construction)
• 5. Systems Operation and Support (Systems
  Implementation and Maintenance)
• In stages 1 2 the key is
• Understand the current system and the problem
• How?

5
Rich Pictures

• enhances understanding
• visual
• concepts
• relationships
• associations
• hierarchies
• How would you draw one?
• 1. Identify main ideas, terms, concepts
• 2. Represent your understanding of these using
  icons
• 3. Represent relationships using arrows, lines
  etc. Label relationships

6
Rich Pictures

• Rich Pictures are informal. There are no rules'.
• However there are some icons that have a common
  meaning
• For example
• the scissors' to indicate conflict
• the thought bubble' to indicate concern or
  issues
• the eyeball to indicate scrutiny or observation
• and obviously the arrow to indicate a
  relationship

7
Rich Pictures

• Questions from Sample Rich Pictures
• Fig 6.14 The Pub
• 1. What is the name of the pub?
• 2. What are the major issues of concern between
  the pub and the community?
• 3. Who the people that are important in this
  system (i.e. to the pub)?
• Fig 4.2 The Professional Organisation
• 1. Describe the organisational structure of the
  professional organisation.
• 2. Which part of this structure is important
  here?
• 3. Who overseas or has an interest in the
  professional organisation?
• 4. What are the major issues of concern to the
  participants in that part of the organisation
  shown in detail here?
• 5. Is there are conflict in the current
  situation? If so describe what it might be?

8
Rich Pictures

• The following you could tackle out of class
• Fig 5.4 Distance Learning
• 1. What is the distance learning all about?
• 2. How are the courses moderated? In other words
  how our standards maintained?
• Vice in the London Area
• 1. Who are the main participants?
• 2. What are the major issues?
• 3. Where the major points of conflict?

9
Ethics

• You, as an IS professional, are making decisions
  that affect people.
• some are based on your belief/value systems.
• a sporting metaphor
• he played the game in that gray area between the
  laws of the game and the spirit of the game'
• your decision making will be governed by
• your own ethical position (a personal thing,
  based on your view of the world).
• professional codes of conduct (external,
  reflecting a consensus and societal view).
• Some alternative ethical positions or
  philosophies
• Egoism --- What is best for a given individual is
  right.
• Utilitarianism --- The actions that are right are
  those that benefit the most people (or produce
  the greatest good for the most people).
• Respect for persons --- Actions are right if
  everyone adopts the moral rule presupposed by the
  action. In other words there are some things that
  are right or wrong and can be judged as before
  the consequences of the actions are studied.