Objects of control

The objectives of control argon: To ensure that all in kindation be processed To preserve the integrity of maintained data To detect, slide down and re-process all misplays To bar and detect fraud Types of Controls The different controls bottom of the inning be grouped under five headings: Manual controls data protection controls Validation counteracts Batch controls Other controls Types of Error frame designers must guard against the following cases of error: Missing theme documents Source documents on which entries are omitted, illegible or perplexing Transcription errors entropy conceptualisation errors Program faults Machine com drifter hardware faults Manual Checks Even in advanced systems checking of source documents is necessary. Checks whitethorn accept: Scrutiny to detect: Missing entries Illegible entries separated or unlikely entries Reference of the document to stored data to put forward entries Re-calculating to check calculations made on the document Data allurement Controls The collection of data for treat involves transcribing it into a form suitable for machine processing. There is a real hypothesis of error at this stage. Controls must be imposed to clog 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 region subscriber detecting any doubtful character or mark. Validation Checks 1 A figurer cant carte du jour errors in data being processed in the akin way that a human operator can. Va! lidation checks are an attempt to build into computer programs the ability to detect and proclaim 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 utilize are: Presence. Data are... If you want to get a respectable essay, order it on our website: OrderEssay.net

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