L1 Cbis
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Transcript of L1 Cbis
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CBIS 1
Managing an Enterprise with Information
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CBIS 2
Management VIA Information Systems
vs.
Management OF Information Systems
Management and IS
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CBIS 3
Management and IS
Management VIA IS: External Focus
Management OF IS: Internal Focus
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CBIS 4
IT Management
“A business within a business”
StrategicFit
StructuralFit
CulturalFit
TechnologyTransfer
IT
Organization
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CBIS 5
Computer-Based Information Systems
IT(hw/sw)
Data
People
Procedures
CBIS
Most imp entity
For transacation purpose
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CBIS 6
Transactions
• Transactions…• Basic business operations such as customer orders,
purchase orders, receipts, time cards, invoices, and payroll checks in an organization
• Transaction processing systems (TPS)• Perform routine operations and serve as a
foundation for other systems
Basically operate at lower level3 levelStrategic ManagerialOperational..
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CBIS 7
Batch vs. On-Line Transaction Processing
• Two types of TPS:– Batch processing
• A system whereby business transactions are accumulated over a period of time and prepared for processing as a single unit or batch
– On-line transaction processing (OLTP)• A system whereby each transaction is processed
immediately, without the delay of accumulating transactions into a batch
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CBIS 8
Point-of-Sale Transaction Processing System
Customer’sreceipt
Inventorydatabase
Managementinformation
system
Exceptionreport
Purchasesdatabase
Scanner
Point-of-saletransactionprocessing
system
Itemdatabase
UPC andquantity
Item, quantity,date, time, price
UPC Price
UPC
Quantity,Date,time Uses to take
decision
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CBIS 9
Control and Management Issues
• Business resumption planning• The implementation of the business resumption plan.
• Disaster recovery(data recovering after loss/hazard)
The process of anticipating and providing for disasters.
• Transaction processing system audit• An examination of the TPS in an attempt to answer three basic
questions
• Does the system meet the business need?
• What procedures and controls have been established?
• Are the procedures and controls being properly used?
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CBIS 10
Management Information System (MIS)
• Management information system • An MIS provides managers with information and
support for effective decision making, and provides feedback on daily operations
• Output, or reports, are usually generated through accumulation of transaction processing data
• Each MIS is an integrated collection of subsystems, which are typically organized along functional lines within an organization(common DB, Centralized DB)
Decision take place @ 2nd level
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CBIS 11
Management Information System Reports
• Scheduled reports(for Batch system)• Produced periodically, or on a schedule (daily, weekly,
monthly)
• Key-indicator report• Summarizes the previous day’s critical activities• Typically available at the beginning of each day
• Demand report• Gives certain information at a manager’s request
• Exception report(highlight deviation )• Automatically produced when a situation is unusual or
requires management action
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CBIS 12
Scheduled Report Example
Daily Sales Detail Report
Prepared: 08/10/xx
Order#
CustomerID
Sales Rep ID
ShipDate Quantity Item # Amount
P12453 C89321 CAR 08/12/96 144 P1234 $3,214
P12453 C89321 CAR 08/12/96 288 P3214 $5,660
P12453 C03214 GWA 08/13/96 12 P4902 $1,224
P12455 C52313 SAK 08/12/96 24 P4012 $2,448
P12456 C34123 JMW 08J/13/96 144 P3214 $720
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CBIS 13
Key Indicator Report Example
Daily Sales Key Indicator Report
ThisMonth
LastMonth
LastYear
Total Orders Month to Date $1,808 $1,694 $1,014
Forecasted Sales for the Month $2,406 $2,224 $2,608
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CBIS 14
Demand Report Example
Daily Sales by Sales Rep Summary Report
Prepared: 08/10/xx
Sales Rep ID Amount
CAR $42,345
GWA $38,950
SAK $22,100
JWN $12,350
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CBIS 15
Exception Report Example
Daily Sales Exception Report – ORDERS OVER $10,000
Prepared: 08/10/xx
Order#
CustomerID
Sales Rep ID
ShipDate Quantity Item # Amount
P12453 C89321 CAR 08/12/96 144 P1234 $13,214
P12453 C89321 CAR 08/12/96 288 P3214 $15,660
P12453 C03214 GWA 08/13/96 12 P4902 $11,224
… … … … … … …
… … … … … … …
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CBIS 16
An Organization’sMIS
FinancialMIS
MarketingMIS
HumanResources
MIS
Etc.
AccountingMIS
Drill down reports
Exception reports
Demand reports
Key-indicator reports
Scheduled reports
Databasesof
externaldata
Databasesof
validtransactions
Transactionprocessing
systems
Businesstransactions
Businesstransactions
ExtranetExtranet
InternetInternet
Etc.
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CBIS 17
Decision Making Levels
Operational-levelmanagers involved withdaily decisions
Strategic-level managersinvolved with long-term
decisions
LowHigh
Decision Frequency
Strategic
Tactical
Operational
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CBIS 18
Decision Support System
• Decision support system (DSS)– Offer potential to assist in solving both semi-
structured and unstructured problems
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CBIS 19
Characteristics of a DSS
• Performs different types of analyses– “What-if” analysis
• Makes hypothetical changes to problem and observes impact on the results
– Simulation• Duplicates features of a real system
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CBIS 20
Components of a DSS
• Model management software (MMS)– Coordinates the use of models in the DSS
• Model base– Provided decision makers with access to a
variety of models( it could be OR technique,)
• Dialogue manager– Allows decision makers to easily access and
manipulate the DSS( has to be user friendly)
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CBIS 21
Database Model base
External databaseaccess
Access to theinternet, networks,and other computersystems
Dialogue manager
DBMS MMS
Externaldatabases
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CBIS 22
Group Decision Support System
• Group Decision Support System (GDSS)– Contains most of the elements of DSS plus
software to provide effective support in group decision-making settings
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CBIS 23
GDSS Alternatives
Local areadecision network
Wide areadecision network
Decisionroom
Teleconferencing
Location of group members
close distant
high
low
Dec
isio
n fr
eque
ncy
Stake holder in meeting room
Use email
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CBIS 24
Executive Support System (ESS)
• Characteristics– A specialized DSS that
includes all the hardware, software, data, procedures, and people used to assist senior-level executives within the organization
Board of directors
President
Function areavice presidents
Function areamanagers
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CBIS 25
Characteristics of ESS
• Tailored to individual executives• Easy to use• Drill down capabilities• Support the need for external data• Help with situations with high degree of
uncertainty.• Futures orientation (predictions, forecasting)• Linked with value-added business processes
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CBIS 26
Expert Systems• Can…
– Explain their reasoning or suggested decisions– Display intelligent behavior– Draw conclusions from complex relationships– Provide portable knowledge
• Expert system shell– A collection of software packages and tools
used to develop expert systems
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CBIS 27
Components of anExpert System
• Knowledge base– Stores all relevant information, data, rules, cases, and
relationships used by the expert system• Inference engine(interact with user & based on it seek information)
– Seeks information and relationships from the knowledge base and provides answers, predictions, and suggestions in the way a human expert would
• Rule– A conditional statement that links given conditions to
actions or outcomes
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CBIS 28
Expert System Logic
• Fuzzy logic– A specialty research area in computer science that
allows shades of gray and does not require everything to be simply yes/no, or true/false(Weather forecasting)
– Application – Washing Machine
• Backward chaining a– A method of reasoning that starts with conclusions and
works backward to the supporting facts
• Forward chaining– A method of reasoning that starts with the facts and
works forward to the conclusions Schematic
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CBIS 29
Inferenceengine
Explanationfacility
Knowledgebase
acquisitionfacility
Userinterface
Knowledgebase
Experts User
FC or BC
Knowledge must abe acuire..cannot be gain frm books
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CBIS 30
TPS, MIS, DSS, ES, & ESS
• Hierarchy:
ESS
DSS/ES
MIS
TPS
Information
Data
Less More Less More
More MoreLess Less
RoutineDecisionsupport
Input &output
Sophistication& complexity of
processing & analysis
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CBIS 31
Competitive Edge with Information Systems ?