Types of information systems For different types oforganizations For different functions withinorganizations For different business needs and at different managementlevels of an organization1 - 2
1 - 3MajorFunctionalSubsystemSome typical usesMarketing Sales forecasting, sales planning, customer andsales analysisManufacturing Production planning and scheduling, costcontrol analysis.Logistics Planning and control of purchasing, inventories,distributionPersonnel Planning personnel requirements, analyzingperformance, salary administration.Finance andAccountingFinancial analysis, cost analysis, capitalrequirements planning, income measurementInformationprocessingInformation system planning, cost-effectivenessanalysisTop management Strategic Planning, resource allocation
9Decision Support Systems Serve middle management Support non routine decision making◦ E.g. What is impact on production schedule ifDecember sales doubled? Often use external information as wellfrom TPS and MIS DSS are either Model-Driven (What if) ordata-driven (Online Analytical Processing)
11Executive support systemsSupport senior managementAddress nonroutine decisions requiringjudgment, evaluation, and insightIncorporate data about external eventsas well as summarized informationfrom internal MIS and DSSE.g. ESS that provides minute-to-minute view of firm’s financialperformance as measured by workingcapital, AP / AR, cash flow, andinventory.
12Model of an ESSThis system pools data fromdiverse internal and externalsources and makes themavailable to executives in aneasy-to-use form.
13Interrelationships AmongSystemsTPS are major producers of information, which, in turn, produce information forother systems. increasingly firms are using new technologies to integrateinformation that resides in many different systems.