ist3 part 2
Terms
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- unstructured (strategic)
- it is not possible to specify in advance most of the decision procedures to follow
- genetic algorithms
- uses darwinian, randomizing, and other mathematical functions--increasingly better solutions to a problem---great for situations in which thousands of solutions are possible
- ES implemented
- expert system shell, software package consisting of an expert system without its knowledge base
- goal seeking analysis
- making repeated changes to selected variables until a chosen variable reaches a target value
- structured desicions
- operational-procedures to follow when decision is needed can be specified in advance
- optimization analysis
- finding an optimum value for selected variables, given certain constraints
- key components of dss
- legacy software, web browser, other software
- es software resources
- inference engine, user interface programs, explanation programs
- Consolidation
- aggregation of data (data about sales offices rolled up to the district level
- es knowledge base
- facts about a specific subject area
- fuzzy logic
- resembles human reasoning, uses terms as very high
- DSS
- provide infomration and techniques to analyze specific problems, interactive inquires and responses, ad hoc, flexible, and adaptable format, information produced by analytical modeling of business data
- sensitivity analysis
- observing how repeated chagnes to a single variable affect other variables
- AI
- artifical intellgence
- semi-structures
- tactical-decision procedures can be prespecified but not enough to lead to the correct decision
- VR
- computer aided design, medical diagnostics adn treatmetn, scientific experimentation, flight simulation, product demonstrations, employee training, entertaimetn
- Intellgent agent
- software surrogate for an end user or a process that fulfills a stated need or activity, bots
- EIS
- executive information system(provide top executives with immediate and easy access to information
- three dimensions of information quality
- time, content, form
- expert system
- knowledge based information system, contain knowledge about a specific, complex applicatoin area, acts as an expert consultant to end users
- DvS
- data visualiztion system(represents complex data, using three dimensional interactive graphical forms(charts, graphs, maps)
- OLAP
- Online ANalytical processing(enables managers adn analysts to examine and manipulate large amounts of detailed and consolidated data from many perspectives
- neural network
- computing systems modeled after the brain's mesh-like network of interconnected processing elements(neurons)
- what if analysis
- observing how changes to selected variables affect other variables
- Enterprise Information Portal
- web based interface and integration of MIS, DSS, EIS, provides access to a variety of internal and external business applications and services
- MIS
- provide information about the performance of the organization, periodic, exception, demand, and push reports and responses, prespecified, fixed format, infomration produced by extraction and manipuation of business data
- How does a typical user use a DSs to make decisions
- decision makers use interactive analytical modeling process, not demanding pre specified information, exploring possible alternatives
- four ways knowledge is represented
- object based, rule based, case based, frame based
- market basket analysis
- determines what products customers purchase together with other products
- slicing and dicing
- viewing database form dfferent viewpoints
- drill down
- display underlying detail data(sales figures by individual product
- GIS
- Geographic Information Systems(uses geographic databases to construct and display maps and other graphic displays