内容正文:
Chapter 2
Overview of Transaction Processing and ERP Systems
2-1
Learning Objectives
Describe the four major steps in the data processing cycle.
Describe the major activities in each cycle.
Describe documents and procedures used to collected and process data.
Describe the ways information is stored in computer-based information systems.
Discuss the types of information that an AIS can provide.
Discuss how organizations use ERP systems to process transactions and provide information.
2-2
Data Processing Cycle
2-3
Input
Process
Output
Storage
The Data Processing Cycle Determines
What data is stored?
Who has access to the data?
How is the data organized?
How can unanticipated information needs be met?
2-4
Data Input—Capture
As a business activity occurs data is collected about:
Each activity of interest
The resources affected
The people who are participating
2-5
Paper-Based Source Documents
Data are collected on source documents
E.g., a sales-order form
The data from paper-based will eventually need to be transferred to the AIS
Turnaround
Usually paper-based
Are sent from organization to customer
Same document is returned by customer to organization
2-6
Cust.
Org.
Turnaround Document
Source Data Automaton
Source data is captured
In machine-readable form
At the time of the business activity
E.g., ATM’s; POS
2-7
Data Input—Accuracy and Control
Well-designed source documents can ensure that data captured is
Accurate
Provide instructions and prompts
Check boxes
Drop-down boxes
Complete
Internal control support
Prenumbered documents
2-8
Data Storage
Types of AIS storage:
Paper-based
Ledgers
Journals
Computer-based
2-9
Ledgers
General
Summary level data for each:
Asset, liability, equity, revenue, and expense
Subsidiary
Detailed data for a General Ledger (Control) Account that has individual sub-accounts
Accounts Receivable
Accounts Payable
2-10
A/R
$1000
Joe Smith $250
Patti Jones $750
A/P
$600
ACME Inc.$150
Jones, Inc $350
Journals
General
Infrequent or specialized transa