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Data Collection

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methods of data collection

Collecting data can be a time-consuming, labour intensive process. So businesses are constantly looking for ways in which data capture and analysis can be automated. However, manual data collection is still common for many business processes. This revision note summarises the main kinds of data collection you need to be aware of.



The table below summarises the main methods of data collection
MethodCommentary
Manual Input Methods
KeyboardA very familiar input device. Typically used to input data into personal computer applications such as databases and spreadsheets
Touch-sensitive screensDeveloped to allow computer monitors to be used as an input device. Selections are made by users touching areas of a screen. Sensors, built into the screen surround, detect what has been touched. These screens are increasingly used to help external customers input transactional data - e.g. buying transport tickets, paying for car parking or requesting information
Automated Input Methods
Magnetic ink character recognition (MICR)MICR involves the recognition by a mchine of specially-formatted characters printed in magnetic ink. This is an expensive method to set up and use - but it is accurate and fast. A good example is the use of magnetic ink characters on the bottom of each cheque in a cheque book
Optical mark reading (OMR)Optical Mark Reading (OMR) uses paper based forms which users simply mark (using a dash) to answer a question. OMR needs no special equipment to mark a form other than a pen/pencil. Data can be processed very quickly and with very low error rates. An OMR scanner then processes the forms directly into the required database. An example you are probably familiar with is the National Lottery entry forms, or answer sheets for those dreaded multiple choice exam papers!
Optical character recognition (OCR) and scannersOCR is the recognition of printed or written characters by software that processes information obtained by a scanner. Each page of text is converted to a digital using a scanner and OCR is then applied to this image to produce a text file. This involves complex image processing algorithms and rarely achieves 100% accuracy so manual proof reading is recommended.
Intelligent Character Recognition (ICR)Intelligent Character Recognition (ICR) again uses paper based forms which respondees can enter handprinted text such as names, dates etc. as well as dash marks with no special equipment needed other than a pen/pencil. An ICR scanner then processes the forms, which are then verified and stored the required database.
Bar coding and EPOSA very important kind of data collection method - in widespread use.
Bar codes are made up of rectangular bars and spaces in varying widths. Read optically, these enable computer software to identify products and items automatically. Numbers or letters are represented by the width and position of each code's bars and spaces, forming a unique 'tag'. Bar codes are printed on individual labels, packaging or documents. When the coded item is handled, the bar code is scanned and the information gained is fed into a computer. Codes are also often used to track and count items.
Businesses of all types and sizes use bar code systems. Best known are retailers using Electronic Point of Sale (EPOS) technology, familiar in supermarkets and many retail operations. Not only saving time at checkout, EPOS cuts management costs by providing an automatic record of what is selling and stock requirements. Customers receive an accurate record of prices and items purchased. Producers use bar coding for quick and accurate stock control, linking easily to customers. Distributors use bar codes as a crucial part of handling goods. Larger businesses and those with high security requirements can use bar codes for personnel identification and access records for sensitive areas.
EFTPOSEFTPOS stands for Electronic Funds Transfer at Point Of Sale. You will find EFTPOS terminals at the till in certain shops. An EFTPOS terminal electronically prints out details of a plastic card transaction. The computer in the terminal gets authorisation for the payment amount (to make sure it's within the credit limit) and checks the card against a list of lost and stolen cards.
Magnetic stripe cardsA card (plastic or paper) with a magnetic strip of recording material on which the magnetic tracks of an identification card are recorded. Magnetic stripe cards are in widespread use as a way of controlling access (e.g. swipe cards for doors, ticket barriers) and confirming identity (e.g. use in bank and cash cards).
Smart cardsA smart card (sometime also called a "chip card") is a plastic card with an embedded microchip. it is widely expected that smart crads will eventually replace magnetic stripe cards in many applications. The smart chip provides significantly more memory than the magnetic stripe. The chip is also capable of processing information. The added memory and processing capabilities are what enable a smart card to offer more services and increased security. Some smart cards can also run multiple applications on one card, this reducing the number of cards required by any one person.
One of the key functions of the smart card is its ability to act as a stored value card, such as Mondex and Visa cash. This enables the card to be used as electronic cash. Smart cards can also allow secure information storage, making them ideal as ID cards and security keys.
Voice recognitionA data collection technology that converts speech into text or interprets it as a sequence of computer commands. Voice recognition is most common in data entry and word processing environments, and fields where a user needs to interact with a computer without using their hands.
Web Data CaptureWeb data capture use electronic forms on either on an Intranet or Internet. They are becoming increasingly popular and have the advantage of being accessible by any user having access to a computer. Users complete the questions online and the returned data is then imported in electronic format to the required database.