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Tuesday, September 24, 2013

Objects of control

The objectives of control argon: To ensure that all in haomaation be processed To preserve the integrity of maintained data To detect, fructify and re-process all misplays To bar and detect fraud Types of Controls The different controls tail be grouped under five headings: Manual controls selective information protection controls Validation counteracts Batch controls Other controls Types of Error schema designers must guard against the following cases of error: Missing etymon documents Source documents on which entries are omitted, illegible or indeterminate Transcription errors info conceptualisation errors Program faults Machine ironware faults Manual Checks Even in advanced systems checking of source documents is necessary. Checks whitethorn accept: Scrutiny to detect: Missing entries Illegible entries illogical or unlikely entries Reference of the document to stored data to personate forward entries Re-calculating to check calculations made on the doc ument Data appealingness Controls The collection of data for impact involves transcribing it into a form suitable for machine processing. There is a real misfortune of error at this stage. Controls must be imposed to retard 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.
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Character recognition. With these techniques, accuracy depends on the geek subscriber detecting any doubtful character or mark. Validation Checks 1 A figurer cant rule errors in data being processed in the ho mogeneous way that a human operator can. Val! idation checks are an attempt to build into computer programs the ability to detect and spread abroad 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 all-embracing essay, order it on our website: OrderEssay.net

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