A detailed report lists details about transactions, such as inventory movement. Several types of reports are commonly produced by TPSs. Much output from a TPS is in the form of reports. For example, inventory receiving data might be checked to ensure that all number entries are numeric that the item is known to the system, and that quantities are in acceptable ranges. Once the data is entered, a program checks it for errors, a process called data validation. Data entry means using a screen similar to the one in this figure to enter data. The receiving report is an example of a source document that is used to perform data entry. The storage function stores the data for use.īefore transaction data can be brought into a TPS, it must be acquired from its source. The output function makes the processing results available outside the system. The processing output transforms the data in some way. The input function accepts data for processing from outside the system. Like other information systems, TPSs perform four main functions: input, processing, output, and data storage. Output includes data back to other TPSs, screens, and reports. Input data comes from users and other TPS. Users of the system are typically personnel who work with business transactions, such as salespeople. The structure of a TPS generally consists of a user or other TPS that interacts with TPS software, and stored data used by the TPS.
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