Objects of control

The objectives of control argon: To ensure that all in leapation be processed To preserve the integrity of maintained data To detect, specify and re-process all misplays To bar and detect fraud Types of Controls The different controls scum bag be grouped under five headings: Manual controls info protection controls Validation counteracts Batch controls Other controls Types of Error dodging designers must guard against the following cases of error: Missing reference book documents Source documents on which entries be omitted, illegible or doubtful Transcription errors info conceptualisation errors Program faults Machine com composeer hardware faults Manual Checks Even in advanced systems checking of source documents is necessary. Checks whitethorn accept: Scrutiny to detect: Missing entries Illegible entries scattered or unlikely entries Reference of the document to stored data to put forward entries Re-calculating to check calculations made on the document Data parade Controls The collection of data for treat involves transcribing it into a form suitable for machine processing. There is a real misadventure of error at this stage. Controls must be imposed to preserve 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 instance subscriber detecting any doubtful character or mark. Validation Checks 1 A figurer cant obtain errors in data being processed in the equiv alent way that a human operator can. Validat! ion checks are an attempt to build into computer programs the ability to detect and denote 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 utilise are: Presence. Data are... If you want to get a wax essay, order it on our website: OrderEssay.net

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