Before transaction data can be brought into a transaction processing system, it must be acquired from its source a step called data capture. Data is often captured from a source document. Data once captured, it is put into the system a step called data entry. As data is entered into the system, a program must check it for errors, a step called data validation. Storage Function Data in a transaction processing system is stored in data files and databases.
Transaction data is data about the transactions that have occurred.
Processing Function Processing involves manipulating data within the system. Decision making checking a condition that causes processing to continue in different ways depending on the result of the decision. Output Function n Output from a transaction processing system can be displayed on a screen or printed on paper. These are called 'reports'. Detail report lists detailed information n Summary report contains summarized information n Exception report lists exceptions to norm Controlling Transaction Processing Systems Procedures to ensure the completeness of the data processing and to minimize the chance of error are called controls.