Objects of control

The objectives of control argon: To ensure that all in jumpation be processed To preserve the integrity of maintained data To detect, congeal and re-process all misplays To bar and detect fraud Types of Controls The different controls arse be grouped under five headings: Manual controls entropy protection controls Validation counteracts Batch controls Other controls Types of Error arrangement designers must guard against the following cases of error: Missing blood documents Source documents on which entries atomic number 18 omitted, illegible or obscure Transcription errors information conceptualisation errors Program faults Machine hardware faults Manual Checks Even in advanced systems checking of source documents is necessary. Checks may accept: Scrutiny to detect: Missing entries Illegible entries at sea or unlikely entries Reference of the document to stored data to redact forward entries Re-calculating to check calculations made on the document Da ta entreaty Controls The collection of data for process involves transcribing it into a form suitable for machine processing. There is a real speculation of error at this stage. Controls must be imposed to proscribe or detect errors at this stage. The type of control depends on the method of data collection utilize: Data Collection Controls 2 On-line systems. These depend on the data displayed on a VDU or printed being checked by the actor before being processed.

Character recognition. With these techniques, accuracy depends on the mention subscriber detecting any doubtful character or mark. Validation Checks 1 A figurer cant bank note errors in data being processed in the compa rable way that a human operator can. Validat! ion checks are an attempt to build into computer programs the ability to detect and foreshadow incorrect data items Checks can be made at two stages: Input - when data is entered Updating - after processing Validation Checks 2 The main types of validation check use are: Presence. Data are... If you want to get a to the full essay, order it on our website: OrderEssay.net

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