Transaction Processing Systems
A transaction processing system captures, checks and records routine business events such as sales, payments, orders and enrollments.
Information Systems
Summary
A transaction processing system captures, checks and records routine business events such as sales, payments, orders and enrollments. Its main users are operational staff, although customers may enter transactions through self-service systems.
At a grocery checkout, scanned items and payment details provide input. The system retrieves prices and calculates the total, then records the accepted sale, updates stock and daily sales totals, and produces a receipt. Business rules determine when the transaction is complete.
| Processing mode | How transactions are handled | Example |
|---|---|---|
| Online processing | Individually and immediately | Checkout sales |
| Batch processing | Collected and processed together later | Posting supplier invoices at day-end |
Accuracy and reliability are essential because incorrect or missing transactions affect customers, inventory and money. System unavailability can interrupt operations. Validation checks entries, authorization restricts permitted actions, and reconciliation compares recorded totals with the actual situation.
Corrections normally use a void or adjustment linked to the original entry rather than deleting it. An audit trail records what was entered or changed, by whom and when, allowing managers and auditors to trace events.
Transaction records support later reports and decisions, so errors in the original records can spread into stock replenishment and other operational decisions.
Common Misconceptions: Recording transactions is not the same as analyzing them. Validation checks entries; reconciliation compares records with reality. Correcting an error should preserve its trace rather than silently erase it.
🧠 Key Concepts
- Business Transactions
- Operational Users
- Online Processing
- Batch Processing
- Business Rules
- Validation
- Authorization
- Reconciliation
- Audit Trail
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Transaction Processing Systems
📘 Overview A transaction processing system records and processes the routine business events that make up an organization's daily operations, such as sales, payments, orders and enrollments. Because its records are the organization's account of what happened, the system must be accurate and dependable.
🧠 Key Idea A transaction processing system captures business events as they occur or collects them for later processing, checks and records them according to business rules, and provides a reliable record of daily operations. The same records later support reports and decisions.
⚔️ Core Details: - A business transaction is an event or exchange that an organization needs to record, such as a customer buying goods, an employee recording attendance or a student enrolling. Such events are routine and repeat many times a day. - Transaction processing system users are mostly operational staff who handle these events, such as cashiers, clerks and warehouse workers, and sometimes customers who enter their own transactions, for example at a self-service kiosk. - Consider a fictional neighborhood grocery store. At the checkout, the cashier scans each item and takes the payment (input). The system looks up each price and totals the sale (processing). Once payment is accepted, it records the sale, reduces the stock of each item sold and adds to the day's sales totals (stored records), and then prints a receipt for the customer (output). - Business rules define when a transaction is considered complete. In the fictional grocery store, the system may finalize a sale after payment is accepted and the sale is recorded, then issue a receipt as confirmation. If a mistake is discovered afterward, staff follow the store's correction procedure rather than silently removing the record. - Accuracy and reliability matter because these records drive daily work and are the source of what the organization knows. A wrong price, a duplicate sale or a lost record affects customers, stock levels and money, and when the system is unavailable the store may be unable to sell. - Transactions can be handled immediately, as at the checkout (online processing), or collected and processed together later, as when supplier invoices are posted at the end of the day (batch processing). - Basic controls protect accuracy. Validation checks entries as they are made, such as requiring a positive quantity and an item code that exists. Authorization limits who may do what, such as allowing only a supervisor to cancel a sale. Reconciliation compares records with reality, such as counting the cash in the drawer against the system's total at closing. - Corrections are made in the open. A correction procedure typically records a void or an adjustment that refers to the original entry, instead of deleting it. The record of what was entered or changed, by whom and when is called an audit trail, and it lets managers and auditors trace what happened. - Transaction records are the base for later work. The day's sales records can be summarized into reports, and the stock records show what to reorder, so the quality of those reports and decisions depends on the quality of the transaction records.
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