Q.Explain the data-processing cycle followed by an Accounting Information System.

An Accounting Information System processes data through a fixed sequence of stages before it becomes a usable report.

The data-processing cycle describes how raw transaction data is converted, step by step, into usable financial information within an Accounting Information System.

1. Input. Source documents — sales invoices, purchase bills, payment and receipt vouchers, bank statements — are collected, and the relevant data is captured, either by keying it in manually or by an electronic means such as a bar-code or online payment confirmation.
2. Processing. The captured data is classified according to the nature of the transaction, and posted to the correct accounts following the rules of debit and credit — for example, a sale on credit is posted to the customer's account and the sales account at the same time.
3. Storage. The processed data is stored in the system's files or database, so that it remains available for retrieval at any later date — this is what allows a trial balance or a customer's ledger to be produced for any date the user chooses, not only the day the entry was made.
4. Output. The stored data is converted into the reports the end-user needs — a trial balance, a trading and profit and loss account, a balance sheet, a stock report, or a statutory return such as a GST filing. …

Students often merge processing and output into one stage, or omit storage entirely, forgetting that stored data is what allows a report to be produced …