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Types of decision support system

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Types of decision support system

  1. 1. TYPES of DSSTYPES of DSS
  2. 2. ObjectivesObjectivesDescribe seven basic types of DSS.Describe seven basic types of DSS.Discuss different categories of DSS.Discuss different categories of DSS. Based on supportBased on support Based on nature of decision situationBased on nature of decision situation Based on number of usersBased on number of usersUnderstand where different types of DSS fit intoUnderstand where different types of DSS fit intoSimon’s model of decision making.Simon’s model of decision making.
  3. 3. The DSS HierarchyThe DSS HierarchySuggestion systemsSuggestion systemsOptimization systemsOptimization systemsRepresentational modelsRepresentational modelsAccounting modelsAccounting modelsAnalysis informationAnalysis informationsystemssystemsData analysis systemsData analysis systemsFile drawer systemsFile drawer systems
  4. 4. File Drawer SystemsFile Drawer SystemsThey are the simplest type of DSSCan provide access to data itemsData is used to make a decisionATM MachineUse the balance to make transfer of fundsdecisions
  5. 5. Data Analysis SystemsData Analysis SystemsProvide access to dataAllows data manipulation capabilitiesAirline Reservation systemNo more seats availableProvide alternative flights you can useUse the info to make flight plans
  6. 6. Analysis Information SystemsAnalysis Information SystemsInformation from several files are combinedSome of these files may be externalWe have a true “data base”The information from one file, table, can becombined with information from other filesto answer a specific query.
  7. 7. Accounting ModelsAccounting ModelsUse internal accounting dataProvide accounting modeling capabilitiesCan not handle uncertaintyUse Bill of Material– Calculate production cost– Make pricing decisions
  8. 8. Representational ModelRepresentational ModelCan incorporate uncertaintyUses models to solve decision problemusing forecastsCan be used to augment the capabilities ofAccounting modelsUse the demand data to forecast next yearsdemandUse the results to make inventory decisions.
  9. 9. Optimization SystemsOptimization SystemsUsed to estimate the effects of differentdecision alternativeBased on optimization modelsCan incorporate uncertaintyAssign sales force to territoryProvide the best assignment schedule
  10. 10. Suggestion SystemsSuggestion SystemsA descriptive model used to suggest to thedecision maker the best actionA prescriptive model used to suggest to thedecision maker the best actionMay incorporate an Expert SystemUse the system to recommend a decisionEx: Applicant applies for personal loan
  11. 11. DSS CategoriesDSS CategoriesSupport-based categories (Alter 1980)Support-based categories (Alter 1980)– Data-based DSSData-based DSS– Model-based DSSModel-based DSSNature of the decision situation (Donovan &Nature of the decision situation (Donovan &Madnick 1977)Madnick 1977)– InstitutionalInstitutional– Ad hocAd hocUser-based categories (Keen 1980)User-based categories (Keen 1980)– IndividualIndividual– Multi-individualMulti-individual– GroupGroup
  12. 12. DSS CategoriesDSS CategoriesSupport based DSSSupport based DSS Data-based DSSData-based DSS Model-based DSSModel-based DSSStructuredSemi-structureUnstructuredModel-basedDSSData-basedDSS
  13. 13. DSS CategoriesDSS CategoriesBased on the nature of the decision situationBased on the nature of the decision situation InstitutionalInstitutional Culture of the organizationCulture of the organization Regularly usedRegularly used Used by more than one personsUsed by more than one persons Ad hocAd hoc One of kindOne of kind One-time useOne-time use Used by single individualUsed by single individual
  14. 14. DSS CategoriesDSS CategoriesBased on number of usersBased on number of users IndividualIndividual Multi-individualMulti-individual GroupGroupBenefits Individual Multi-individualGroupImproving personal efficiency H H LExpediting problem solving L M HFacilitating communication L L HPromoting learning M H HIncreasing control L H M
  15. 15. Simon’s ModelSimon’s ModelProblem IdentificationQualitativeAnalysisQuantitativeAnalysisDecisionExternal InternalAI, EISESDbDSS,MbDSSGDSSESDSSIntelligenceDesignChoice
  16. 16. Usage ModesUsage ModesSubscription ModeTerminal ModeClerk ModeIntermediary Mode
  17. 17. Subscription ModelSubscription ModelDecision maker receives outputs from theDSS on regular basis
  18. 18. Terminal ModeTerminal ModeDirect use of the DSS by the decisionmakerAccess is through individual terminalsMay be user specific requirements
  19. 19. Clerk ModeClerk ModeDecision maker fills out a form requestingoutput from DSSA clerk accesses the DSSSends the output to the decision maker
  20. 20. Intermediary ModeIntermediary ModeDecision maker uses the DSS with the helpof a professional, knowledgeable assistantThe assistant can be either a:– Staff Assistant– Technical Support Staff– Business Analyst