Designing Computer-based information system
Not everything but as much as i could do !
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?- Created by: Charlotte
- Created on: 14-04-13 15:50
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- Designing Computer-based information systems
- Processing systems - (processing, response time, user interface)
- Batch
- processes batches of data at regular intervals. Usually large of identical type. e.g. bank statements. User interface: code based, response time is delayed (days) and processes when the system is not busy and off-line.
- Interactive
- handles transitions one at a time and each transation must be fully processed th response given to the user and associated files updated before next transatction is procesed. Processing: each transaction completed before next. Response time: dependent on action from user. User interface: GUI
- Real-time
- processes data at the time the data is input. the data must be handled within a specified maximum time limit. Processing: data processed as soon as it is received by processor. Response time: very quick (<4secs). User interface: based on user's requirements.
- Batch
- Types of operating system
- single user
- Can support more than one user account but only one user can have access to the system at one time.
- Multi user
- Lets more than one user access the system at the same time. Usually provided by a network
- Multi tasking
- Processor carrying out more than one task at a time e.g. word processor & internet. To do this; needs multiple processors
- Interactive
- Runs with direct user interaction while a program is running
- Real-time
- developed for realtime applications (embedded) e.g. car management system
- Batch processing
- given a task to run without user intervention (nighttime or weekend) or just before end of month for payroll etc.
- Distributed processing
- number of computers connected together and each computer completes part of the processing. When all completed, results are combined to meet the requirements of the user.
- single user
- Designing and using a human-computer interface
- colour
- should follow corporate colours & colours in HCI should not clash
- layout
- consistent used on all screens of the HCI & follow layout of original documents
- quantity of on-screen information
- linked to amount of white space used. enable the user to effectively use the screen and complete their tasks. Not too much info either
- size of font and style
- clear and font size which is easy to read e.g. verdana & 12+
- Complexity of language
- kept as low as poss. Any error messages in simple language
- Type of controls
- ease of use, including buttons, forms and menus
- colour
- Different methods of dialogue
- Computer and person
- prompt, nature of input, methods of input and feedback
- Person and computer
- Computer and computer
- Computer and person
- Methods of human-device communications,particularly HCI
- Command-line interfaces
- menus/sub-menus
- Graphical User Interfaces (GUIs)
- Natural Language (including speech input-output)
- Forms Dialogue
- Designing an interface. Looking at a potential users:
- perception
- sights and sounds
- attention
- attention span; only limited, which is linked to amount of time they can look at a screen. To help: uncluttered layout in logical order.
- Memory
- parts of the interface will not be used regularly and memory cannot be relied on & designer needs to ensure that the actions required need to be held in the users short-term memory (logical order/uncluttered screen).
- learning
- how easy is it to learn? consistent but not distracting layouts
- perception
- Model Human Processor (Card, Moran & Newell
- Mental Mordel
- Processing systems - (processing, response time, user interface)
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