dss design. mtis approach t management concept t obtaining results through people t obtaining...
DESCRIPTION
If-Then Models l DSS analysis l Influence diagram l requisite variety application l DSS design l variables -for-manipulation l dialog decision tree diagram l DSS generator-specific implementation principleTRANSCRIPT
DSS DesignDSS Design
MTIS ApproachMTIS Approach Management concept
Obtaining results through people Obtaining results through information systems
Steering activities:
activities that change the existing ways of delivering goods and services, or create new ones.
Types of DSS
Data oriented (data analysis models) model oriented (if-then models) data and model oriented (complex models)
If-Then ModelsIf-Then Models DSS analysis
Influence diagram requisite variety application
DSS design variables -for-manipulation dialog decision tree diagram DSS generator-specific
implementation principle
Influence Diagram AnalysisInfluence Diagram AnalysisA. Prepare a problem narrative
B. Classify variables
1. Decision variables : under control of decision-maker2. Outcome variables : results, measure of performance3. Exogenous/assumptions : affect but are not affected4. Intermediary variables : necessary to link other variables
C. Draw influence diagram
Decision variables
Exogenous and Intermediary variables
Outcome variables
Influences
D. Derive equations for modeling the problem
Classification of VariablesClassification of Variables
Decision variables Intermediate variablesSales Price VolumeInvestment Net Sales Unit Cost
Direct Costs Outcome variables Mfg Overhead
Net After Tax Cost of SalesRate of Return Depreciation Gross Profit
Exogenous/Assumption Admin ExpensesMarket Growth Net Before TaxTax Rate
Influence DiagramInfluence Diagram
Equations for Sales Price and Equations for Sales Price and Investment DecisionsInvestment Decisions
Volume = 15,000 * (1+Mkt Growth) - 6,666 * Sales PriceUnit Cost = 1.3 - .00009 * InvestmentNet Sales = Sales Price * VolumeDirect Costs = Unit Cost * VolumeMfg Overhead = .1 * Net SalesCost of Sales = Mfg Overhead + Direct CostsGross Profit = Net Sales - Cost of SalesDepreciation = Function(Investment)Admin Expenses = .04 * Net SalesNet Before Tax = Gross Profit - Admin Expenses - DepreciationNet After Tax = (1-Tax Rate) * Net Before TaxRate of Return = Function( Net After Tax, Depreciation,
Investment)
Dialog Decision Tree DiagramDialog Decision Tree Diagram
Implementation PrincipleImplementation Principle
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one spreadsheet many spreadsheets
many spreadsheets
Diagonal Serial
3-D
cell addresses macros
3-D cell addresses