Isys pg 26-30
Terms
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- Information overload
- amount of information overpowerrs one's ability to manage and use it
- CBIS
- computer-based information system : use of computer hardware and software, databases, telecomm, people, procedures to manage and distribute digital info.
- Database
- collection of data stored on a computer, organized to meet one's need
- Point
- ISYS is defense against information overload and databases meet users' needs
- information system
- covers a wide variety of computer applications
- Computer system
- used to describe multiple computers working together
- information technology
- defined as issues related to components of an information system
- off-the shelf software
- software prepackaged and sold to public
- custom-designed software
- software created to address the needs of an individual entity
- Systems development
- creating new or modifying existing systems
- System analysts
- information professionals responsible for designing information systems
- Four information systems from most basic to the most intelligent
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1. Transaction Processing System
2. Management Information System
3. Decision Support System
4.Expert System - TPS
- Transaction processing system: used to support and record transactions e.g paying faculty, processing grades etc
- E-commerce
- when transaction are carried online or other network systems
- MIS
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Management information system : provides info to decision makers in the form of a report
1. base decision on a report
2.focus on operational efficiency
3. used on business and non-businness enviornment
4. seraches databases
e.g NASA recieved data from Mars - DSS
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Decision Support system: isys used to support problem specific decision making
1.supports rather than replaces decision making
e.g online dating website - MIS vs DSS
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1.DSS more than a database search, it is formulas and logic to input
2. MIS does things right and DSS do the right thing - GDDSS
- kind of DSS. this is a group decision support system...tools for groups to come to conccensus with min time and effort.
- ES
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Expert systems: isys to make suggestions in a particular expertise like a human expert.
1. Uses AI techniques
2.works with probabilities
3.experience had in field for years
3. developed with extensive interview and observation.
e.g ideal schedule for student after telling all kinds of details