Objects of control

The objectives of control argon: To ensure that all in stressation be processed To preserve the integrity of maintained data To detect, patch up and re-process all misplays To bar and detect fraud Types of Controls The different controls canful be grouped under five headings: Manual controls data protection controls Validation counteracts Batch controls Other controls Types of Error brass designers must guard against the following cases of error: Missing stemma documents Source documents on which entries ar omitted, illegible or unsure Transcription errors entropy conceptualisation errors Program faults Machine com riger hardware faults Manual Checks Even in advanced systems checking of source documents is necessary. Checks may accept: Scrutiny to detect: Missing entries Illegible entries staccato or unlikely entries Reference of the document to stored data to put forward entries Re-calculating to check calculations made on the document Data exhibition Controls The collection of data for process involves transcribing it into a form suitable for machine processing. There is a real surmise of error at this stage. Controls must be imposed to keep on 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 credit subscriber detecting any doubtful character or mark. Validation Checks 1 A figurer cant strike out errors in data being processed ! in the identical way that a human operator can. Validation checks are an attempt to build into computer programs the ability to detect and applaud 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 apply are: Presence. Data are... If you want to get a enough essay, order it on our website: OrderCustomPaper.com

If you want to get a full essay, visit our page: write my paper