文档介绍：Transaction Processing Systems
Manual or automatic – all businesses systematically process transactions
Function: procme business processing in case of disaster?
Audit
Can you verify the integrity of the system?
How will you know if transactions are not processed or are processed incorrectly?
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TPS By Function
Order Processing
Procurement & Inventory Control
Accounting
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Order Processing TPS
Order capture
Variety of means
Configuration
Shipment planning and inventory allocation
Prioritize orders, select shipment locations, allocate inventory to orders
Shipping and warehousing
Picking, packing, invoicing, reporting
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Procurement
Inventory Control
Raw materials, WIP, FGI, etc
Purchase Order Processing
Generating, transmitting, maintaining purchase orders
Receiving
Accounts Payable
Boundary between procurement and accounting
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Accounting
Accounts Payable
Accounts Receivable
Budget
Payroll
General Ledger
Asset Management
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Disadvantages of Functionally Organized TPS
Processing inefficiency
Data redundancy
Causes integrity problems
Inefficient
Temporal integrity problems
Caused by different times at which processing occurs
Lack of information coherence
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Enterprise Resource Planning Systems
Key word is Enterprise: solution designed for entire enterprise
All processes organized around one enterprise-wide data model
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Advantages of ERP
Elimination of costly legacy systems
Old systems are expensive to maintain and reduce business agility
Improvement of processes
ERP may have implemented best-in-class processes
Improve data access and data integrity
Provide complete, consistent view of enterprise data
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Disadvantages of ERP
Implementation cost
Software and hardware
Expertise
Opportunity costs
Time to implementation
Lengthy and difficult process
MOC (management of change) challenges
System integration difficulties
Vendor dependence
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Current ERP Vendors
SAP
Baan
PeopleSoft
Oracle
J. D.