Input__Output_Design

Input__Output_Design - Input Design Input Implementation...

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Unformatted text preview: Input Design Input Implementation Methods Keyboard Mouse Touch Screen Point-of-sale terminals Sound and speech Automatic data capture Optical mark recognition (OMR) Bar codes Optical character recognition (OCR) Magnetic Ink Electromagnetic transmission Smart cards Biometric Trends in Automatic Data Collection Technology Biometric: Consists of sensors that capture an individuals characteristic (Finger Print, retina) , digitizes the image pattern, and then compares the image to stored patterns for identification. Trends in Automatic Data Collection Technology Electromagnetic: This technology involves attaching a tag and antenna to the physical object that is to be tracked, then using radio frequency to identify physical objects. RFID E-ZPass/Smart Tag Trends in Automatic Data Collection Technology Smart Cards: Smart card technology has the ability to store a massive amount of information on cards that are similar but slightly thicker than credit cards. They also contain a microprocessor, memory circuits, and a battery. System User Issues for Input Design General Principles: Inputs should be as simple as possible and designed to reduce the possibility of incorrect data being entered. Capture only variable data. PART NUMBER ( OK ) PART DESCRIPTION ( NO ) (Can be extracted from the database) Do not capture data that can be calculated you don't need to input EXTENDED PRICE, which is = QUANTITY ORDERED * PRICE. System User Issues for Input Design Source Documents Include instructions for completing the form. Minimize the amount of handwriting Use Check Boxes Data to be entered (keyed) should be sequenced so it can be read top to bottom and left to right . Bad Flow in a Form Good Flow in a Form Internal Controls for Inputs Input controls ensure: Data input is accurate The system is protected against accidental and intentional errors and abuse, including fraud. Internal Controls Guidelines for Inputs Validate data: Completeness checks Have all required fields been entered?...
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Input__Output_Design - Input Design Input Implementation...

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