Electronic Data Interchange

Related Terms: Data Encryption

In the quest to achieve a paperless society, electronic data interchange (EDI) has long been a leading technology. Ralph W. Notto, a leading chronicler of electronic commerce (see Challenge and consequence; forcing change to e-Commerce), has noted that EDI is and has been an essential component in such commerce. EDI predates the emergence of the Internet, now the chief electronic network connecting just about every business to every other. The first implementations of EDI were internal to companies, used private networks, and enabled a multi-location company to use a common accounting system regardless of location. Earliest uses of EDI were also heavily deployed to track parts inventories within a business—but also between a producer, its distributors, and, in turn, the dealers served by the distributors. These private networks were full-grown implementations of EDI in the sense that data were exchanged by means of wired and/or wireless networks and kept data in live format and therefore instantly accessible.

With the spread of small computers, EDI in the less automated form of exchanges of data on tape and on diskettes (and later on CDs) came into widespread use. This technique is still widely used in the exchange of electronic files between systems using the Internet; either e-mail or up/downloading to/from file transfer protocol (FTP) sites is used. Many EDI systems in use in the mid-2000s remain private and move data through private networks; many others utilize proprietary software, but the software uses Internet connections; yet other forms are special arrangements for data sharing making use of standard methods of Internet exchange. Large systems today invariably involve data encryption to ensure data security.

The driving force behind EDI is efficiency made possible by avoiding the handling and rekeying of data on paper. Electronic scanning of bar codes at the point of sale or in inventory taking and document scanning technologies combined with improvements in optical character recognition (OCR) systems have further contributed to EDI by replacing keying of some documents. Data capture, however, is still accomplished predominantly by human keying. A human interface is also typically necessary to check OCR results.

Electronic data interchange had its beginnings in the management of financial data. The technique, however, is rapidly expanding to documentary information and, in such areas as security and law enforcement, also to biometric data.

BENEFITS OF EDI

EDI was developed to solve the problems inherent in paper-based transaction processing and in other forms of electronic communication. In solving these problems, EDI is a tool that enables organizations to reengineer information flows and business processes. It directly addresses several problems long associated with paper-based transaction systems:

• Time delays—Paper documents may take days to transport from one location to another, while manual processing methodologies necessitate steps like keying and filing that are rendered unnecessary through EDI.
• Labor costs—In non-EDI systems, manual processing is required for data keying, document storage and retrieval, sorting, matching, reconciling, envelope stuffing, stamping, signing, etc. While automated equipment can help with some of these processes, most managers will agree that labor costs for document processing represent a significant proportion of their overhead. In general, labor-based processes are much more expensive in the long term than are EDI alternatives.
• Accuracy—EDI systems are more accurate than their manual processing counterparts because there are fewer points at which errors can be introduced into the system.

• Information Access—EDI systems permit myriad users access to a vast amount of detailed transaction data in a timely fashion. In a non-EDI environment, in which information is held in offices and file cabinets, such dissemination of information is possible only with great effort, and it cannot hope to match an EDI system's timeliness. Because EDI data is already in computer-retrievable form, it is subject to automated processing and analysis. It also requires far less storage space.

INFRASTRUCTURE FOR EDI

Several elements of infrastructure must exist in order to introduce an EDI system, including: 1) format standards to facilitate automated processing by all users, 2) translation software to translate from a user's proprietary format for internal data storage into the generic external format and back again, 3) value-added networks to solve the technical problems of sending information between computers, 4) inexpensive microcomputers to bring all potential users—even small ones—into the market, and 5) procedures for complying with legal rules. It has only been in the past several years that all of these ingredients have fallen into place.

Format Standards

To permit the efficient use of computers, information must be highly organized into a consistent data format. A format defines how information in a message is organized: what data go where, what data are mandatory, what is optional, how many characters are permitted for each data field, how data fields are ordered, and what codes or abbreviations are permitted.

Early EDI efforts in the 1960s used proprietary formats developed by one firm for exclusive use by its trading partners. This worked well until a firm wanted to exchange EDI documents with other firms who wanted to use their own formats. Since the different formats were not compatible, data exchange was difficult if not impossible. To facilitate the widespread use of EDI, standard formats were developed so that an electronic message sent by one party could be understood by any receiver that subscribes to that format standard. In the United States the Transportation Data Coordinating Committee began in 1968 to design format standards for transportation documents. The first document was approved in 1975. This group pioneered the ideas that are used by all standards organizations today.

 1 | 2  NEXT