INFORMATION SYSTEMS DEVELOPMENT PROCESS Essay Example For Students

INFORMATION SYSTEMS DEVELOPMENT PROCESS Essay Oliver LinesBABS 2 OptionManaging Information Systems In OrganisationsRECENT ADVANCES IN SYSTEMS DEVELOPMENT WILL RADICALLYCHANGE THE INFORMATION SYSTEMS DEVELOPMENT PROCESSINTRODUCTIONIn recent years, there has been an abundance of new technologies in the information systems field. These new technologies have altered the very development process itself. Information systems have gone from being a series of one level databases to three dimensional reality, virtual reality, and multimedia systems. In the early days of information systems, the demands were for data, with no real function of artificial intelligence. However, as the 21st century approaches, business has taken on an entirely different function, and the need for individual information systems has grown immensely. This demand for information technology is in all areas of business: corporations, law, medicine, science and even small business. In addition, the worldwide web and the Internet have added an additional factor of c ommunications. Most information systems in use today require at the very least, a measure of Internet capability. In order to understand the changes in these development processes, the history of databases should be analyzed. BACKGROUNDDatabase Management Systems actually began in the 1950s, with what is known as the first generation, also known as file systems on tape. The major task of any computer in those days was to process data under the control of a program. This primarily meant calculating, counting and simple tasks. Second generation databases, file systems on disk, allowed use of computers in dialogue mode as well as batch mode. The development of magnetic disks allowed for more sophisticated file systems, making multiple access possible. These first two generations of DBMS were characterized by the availability of file systems only; strictly speaking these were the forerunners of database systems, the foundations. An important component of these database systems were the static association of certain data sets (files) with individual programs that would concentrate on these. There were high redundancy problems between files; inconsistencies when one program made changes that are not made in all programs; inflexibility against changes in applications; low productivity by programmers since program maintenance was expensive; and the problem of adopting and maintaining standards for coding and data formats. The third generation, pre-relational databases, started in the 1960s and continued into the 1970s. This generation is characterized by the introduction of a distinction between logical and physical information, along with a parallel need to manage large collections of data. Data models were used for the first time to describe physical structures from a logical point of view. With this distinction between the logical and physical information, value systems were developed which could integrate all the data of a given application into one collection. The fourth generation consisted of relational databases and began in the 1980s, resulting in database systems that could store data redundancy free under a central control and in a clear distinction between physical and a logical data model. Systems based on relationship modeling occurred during this period of time. The systems based on relationship modeling are provided with a high degree of physical data independence and the availability of powerful languages. Less of the system is visible to the user, with changes taking place in the background. A shift from record orientation to set orientation marks this fourth generation. As of 1991, there was a fifth generation predicted, post-relational, which we are currently experiencing, and perhaps surpassing. Other applications can benefit from database technology. The development of extensible systems, logic-oriented systems, and object-oriented systems are part of this generation. R.G. Cattel speaks of the changes seen in the last fifteen years:The past decade has seen major changes in the computing industry. There has been a widespread move from centralized computing to networked workstations on every desk. We have seen an entirely new generation of software aimed at exploiting workstation technology, particularly in engineering, scientific and office applications. In database systems, there have been major changes in products for business applications, including the widespread acceptance of relational DBMSs. However, existing commercial DBMSs, both small-scale and large-scale, have proven inadequate for applications such as computer-aided design, software engineering, and office automation; new research and development in database systems has been necessary. (Cattell 1991)The very nature of these new object oriented databases has caused changes right down to the programming level. As we near the end of this century, designers are now looking at databases that can predict the side effects of medicines, eliminating the need for human trial subjects. Other programs are being designed to put in data for architecture to check building integrity. Car manufacturers are able to input data and have three-dimensional models to experiment with, regarding stress factors and damage. With so much new technology erupting every day, some needs have developed for a standardization of protocols and a way to store all the data. DEVELOPMENTSMark Hammond (PC Week) talks about a new development for standardization. IBM has developed DRDA (Distributed Relational Database Architecture) which is a standard interoperability protocol for databases and applications. The DRDA was developed in 1989, and is finally out into the public domain and ready for use. Data warehousing is a new development on the Information System front, and is actually the culmination of new developments in data technology. Gabrielle Gagnon identifies these developments. They include entity-relationship modeling, heuristic searches, mass data storage, neural networks, multiprocessing, and natural-language interfaces. She goes on to say the data warehouse is a centralized integrated repository of information, one that can provide a vital competitive edge for product development. There are several types of data warehouses, including the operational data store (ODS), the data mart, which is of value in analyzing sales, and the enterprise warehouse, which can do both a centralized and distributed approach. The Young Years: Adoph Hitler Was Born On April 20, 1889 And Lived In EssayTHE PRESENTCost in technology is becoming less of an issue. Prices have come down significantly in the last few years. Demands on space and technology in a PC have been lowered, and concurrently, computer technology has experienced huge growth, resulting in advanced technology installed on computers at the sale point. Our friends in America spent $200 million on voice recognition software in 1997, and by the year 2001, that amount is expected to jump to $3 billion, according to the consulting firm Voice Information AssociatesThe systems development that is taking place at the end of the 20th century is vastly different than what took place in the early days of computers. Technology today requires communication between the designers of systems and their clients. Businesses want individualized systems, but these systems need to be able to cross international lines, requiring uniform standards across the board. Customer information systems are being used in industries today. These systems allow companies to understand individual consumers as well as identify new markets and develop new and innovative technology products. Companies are able to take advantage of the following factors:1. Databases are far larger today than they were even in the fairly recent past. These databases may include information on tens of millions of households. 2. The depth of information generated from databases on individuals and households can be much greater. 3. This information can be used as part of a highly automated business function. The development of information systems needs to keep pace with these changing demands from industry. In the past, programs were designed as large, umbrella programs, meant to serve the same clientele. Today, however, there is more individualization required for information systems. This also results in the need for flexibly trained programmers and designers; they must be able to custom design systems where necessary. Even small businesses like RWH Enterprises LTD (a small import/export company in Cambridgeshire) are not content with settling for systems designed to cope with their broad sector. They require a system that will cater for all their business needs and are now employing programmers, who together with management look for any ways the business process can be simplified and made more efficient with the use of individualized systems. CONCLUSIONThere has been an ongoing evolution in the information systems area. Initially there were electronic processing systems; these were replaced by management information systems. In the 1980s, decision support systems emerged to facilitate the decision making process. These programs provide flexibility and insight into changing managerial needs. In the last decade, emphasis was placed on strategic needs, and strategic information systems emerged. One common thread throughout the evolution of these systems is the increasing need for programs that can think. That provides a challenge to systems programmers and changes the way systems are developed. Another factor affecting the development of information systems is the growing need for systems in the international market. Systems that are developed need to be standardized and a set of protocols need to be in place to ensure equal development across the board. Information systems are an area that would benefit from ISO 9000 standards; these standards provide uniform code worldwide. As the twenty-first century approaches, the development of information systems is going to continue to change. It has evolved from a strict database to multi-function abilities in just twenty years. In the last decade virtual reality, three dimensional imaging, artificial intelligence and reliance on the Internet have emerged. Developments will have to occur quickly, no longer having the luxury of being able to take years to develop. Systems will need to emerge that help and assist the systems development process. After all the world is now affectivity smaller; it now takes only minutes for something to electronically travel to the other side of the globe and this means Information Systems development will have to keep pace, staying slightly ahead of the rapid changes continuously taking place. We are now in the Information Revolution and have become fairly reliant on technology. It is a fact that 90% of the scientists that our planet has ever seen are alive today and therefore we are going to see rapid development in this area, not only in technology but also in functionality. Information Systems will rapidly emerge into a wealth of applications until it eventually becomes an extension of the person (maybe in a literal sense some day). That, I believe, is the future. BIBLIOGRAPHYCattell, R.G.G., Object Data Management: Object-oriented and Extended Relational Database Systems Reading, MA: Addison-Wesley Publishing Company, 1991. Gagnon, Gabrielle, Data Warehousing: An Overview PC Magazine, March 9, 1999. Hammond, Mark, DRDA Standard Could Finally Get Rival Databases Talking, PC Week, December 7, 1998. Mayor, Tracy, Look Ma, No Hands PC Week, July 1, 1996. Coskun, Samli A., Information-Driven Marketing Decisions: Development of Strategic Information Systems Quorum Books, 1996. Schindler, Esther, The Computer Speech Book Academic Press, Inc., 1996. Sichel, Daniel E., The Computer Revolution An Economic Perspective The Brookings Institution, 1997. Vossen, Gottfried, Data Models, Database languages and Database Management Systems Wokingham, 1991. Watterson, Karen, Blueprint For A Database Data Based Advisor, June, 1990. Category: Technology