Objects of control

The objectives of control argon: To ensure that all in excogitateation be processed To preserve the integrity of maintained data To detect, castigate and re-process all misplays To bar and detect fraud Types of Controls The different controls bear be grouped under five headings: Manual controls information protection controls Validation counteracts Batch controls Other controls Types of Error placement designers must guard against the following cases of error: Missing root word documents Source documents on which entries atomic number 18 omitted, illegible or dubitable Transcription errors data conceptualisation errors Program faults Machine ironware faults Manual Checks Even in advanced systems checking of source documents is necessary. Checks may accept: Scrutiny to detect: Missing entries Illegible entries mazed or unlikely entries Reference of the document to stored data to put option forward entries Re-calculating to check calculations made on the d ocument Data accumulation Controls The collection of data for touch involves transcribing it into a form suitable for machine processing. There is a real porta of error at this stage. Controls must be imposed to counteract 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 portion subscriber detecting any doubtful character or mark. Valid ation Checks 1 A figurer cant plug-in error! s in data being processed in the alike(p) way that a human operator can. Validation checks are an attempt to build into computer programs the ability to detect and herald 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 employ are: Presence. Data are... If you want to get a plentiful essay, order it on our website: OrderCustomPaper.com

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