Information system development life cycle models Essay

Health information managers must understand the components of information systems and how information systems affect the organization, individuals within the organization, and interested publics outside the organization. Information systems provide opportunities to improve internal operations, create competitive advantage in the marketplace, improve patient-care delivery, enhance research, and provide better service. Information system risk occurs when the systems are not well integrated, are poorly managed, or do not support the goals of the organization. In order to exploit information system opportunities and minimize threats and risks, a thorough understanding of information system components and how these relate to the organization is necessary. An information system is composed of a group of components (people, work processes, data, and information technologies) that interact through defined relationships to accomplish a goal. Information systems must be able to adapt to environmental change. A good example of a health-related information system is an order entry system. The goal of the system is to process physician orders. The system is composed of a group of components including people (nurses, physicians, unit secretaries, laboratory personnel), data, work processes, and information technologies. Each of these components interacts through defined relationships. fails to accommodate the environment or if the interactions among its component parts fail, the system becomes nonfunctional and disintegrates. Thus, a system must be composed of a group of components that: ï‚ · Interact through defined relationships ï‚ · Work toward accomplishing a goal ï‚ · Self-adapt and respond to environmental changes Figure 2-1 provides an example of the relationship of these characteristics. An information system is composed of a group of components (people, work processes, data, and information technologies) that interact through defined relationships to accomplish a goal. Information systems must be able to adapt to environmental change. A good example of a health-related information system is an order entry system. The goal of the system is to  process physician orders. The system is composed of a group of components including people (nurses, physicians, unit secretaries, laboratory personnel), data, work processes, and information technologies. Each of these components interacts through defined relationships The peoples enter orders in a predefined way through a data entry terminal (hardware) and through interaction with software. Through the predefined interactions between the hardware and software, the order is processed. The order entry system is self-adapting and able to accommodate environmental changes such as order volume. The example depicted in Figure 2-2 demonstrates the characteristics of a system as applied to an information system: component parts working in predefined relationships that can self-adapt to environmental changes to accomplish a common goal. As the bidirectional arrows depict in Figure 2-2, at any given time there is a potential three-way interaction between all system components. People interact or are affected by work practices, data, and information technologies. Work practices affect people and may be impacted by data availability and information technologies. Information technologies may affect work practices, people, and the input, processing, or dissemination of data. Thus, we see that information components are highly interrelated. Recognizing these interrelationships is very important, since a problem with one component will likely adversely impact all other components within an information system. When information system problems arise, it is crucial that all information system components and their relationships be examined System Elements Systems have three principal elements: inputs, processing mechanisms, and outputs. Figure 2-3 depicts their simple relationship. In the order entry example given previously, inputs include physician orders such as laboratory, radiology, or pharmacy orders that are entered in a computer terminal on the patient-care unit. The orders are subjected to several processing mechanisms that check their consistency and completeness before they are routed to the appropriate department. The output of the system is a requisition for a specific type of test, procedure, or pharmaceutical. In addition to inputs, processes, and outputs, most systems also have a  feedback loop. Feedback provided by the system influences future inputs. In the order entry example, feedback regarding nonavailability of an ordered drug in the pharmacy department inventory might be provided to the physician. In this case, the system might suggest what alternatives or substitutes are available Information System Components All definitions of an information system must embody the essence of the four system characteristics that were previously presented. Thus, an information system is a group of interrelated and self-adapting components working through defined relationships to collect, process, and disseminate data and information for accomplishment of specific organizational goals. The components of an information system should be broadly interpreted. For example, information system components should be viewed to include people, work procedures, data, and information technologies (Alter, 1992). Although organizational goals may not be specifically included in the components of an information system, they must be viewed as the driving force for the development, design, implementation, and evaluation of information systems. Each information system must be evaluated in terms of its contribution to meeting the goals of the organization Information System Types In Chapter 2, six types of information systems are discussed: transaction processing systems (TPS), management information systems (MIS), decision support systems (DSS), executive information systems (EIS), expert systems (ES), and office automation systems (OAS). Early systems in health care were principally transaction processing systems. These systems automated operational functions such as accounting, payroll, inventory, and admission/discharge systems. Later, other transaction systems, such as order entry, were added to the capabilities. Management information systems emerged in the late 1970s and gradually became more sophisticated during the 1980s. One factor influencing the growth of MIS during this period was the introduction of the national prospective payment (diagnostic-related groups or DRGs) system for Medicare patients. Because of DRG implementation, hospitals needed information systems that provided better filtered and formatted data for making managerial and strategic decisions. The  implementation of DRGs also revealed the weaknesses of current information systems in linking and integrating data. Weaknesses associated with the proliferation of stand-alone systems and the historical emphasis on financial systems became magnified during the 1980s coiera When the same kind of decision is made on a regular basis, it will require access to the same kind of data and may use the same knowledge. In these circumstances, one can develop a regular process or information system to accomplish the task. An information system could thus be anything from the routine way in which a clinician records patient details in a pocket notebook, the way a triage nurse assesses patients on arrival in an emergency department, through to a complex computer-based system that regulates payments for healthcare services. An information system is distinguished from other systems by its components, which include data and models. Recall from the last chapter that there are several different kinds of information model, including databases and knowledge bases. These different information components can be put together to create an information system. For example, consider a calculator that can store data and equations in its memory. The data store is the calculator’s database, and the equation store is its knowledge base. The input to the calculator becomes the equation to be solved, as well as the values of data to plug into the equation. The database communicates with the knowledge base using a simple communication channel within the device, and the output of the system is the value for the solved equation (Figure 3.6). There are many potential internal components that could be included within an information system, including a database, a knowledge base, an ontology, and decision procedures or rules of inference. The different components of an information system are connected together with input/output channels, which allow data to be shifted between the components as needed. A patient record system is a more complex example of an information system. Its purpose is to record data about particular patients in some formalized fashion to assist in the control Wager2009  An information system (IS) is an arrangement of information (data), processes, people, and information technology that interact to collect, process, store, and provide as output the information needed to support the organization (Whitten & Bentley, 2005). Note that information technology is a component of every information system. Information technology is a contemporary term that describes the combination of computer technology (hardware and software) with data and telecommunications technology (data, image, and voice networks). Often in current management literature the terms information system and information technology are used interchangeably. 6.1.1 What Is a System?shortliffe Until now, we have referred informally to health information systems and computer systems. What do we mean when we refer to a system? In the most general sense, a system is an organized set of procedures for accomplishing a task. It is described in terms of (1) the problem to be solved; (2) the data and knowledge required to address the problem; and (3) the internal process for transforming the available input into the desired output (Figure 6.1). When we talk about systems in this book, we usually mean computer-based (or just computer) systems. A computer system combines both manual and automated processes; people and machines work in concert to manage and use information. A computer system has these components: ââ€"  Hardware: The physical equipment, including processing units (e.g., the central processing unit (CPU)), data-storage devices, comunication equipment, terminals, and printers ââ€"  Software: The computer programs that direct the hardware to carry out the automated processes—i.e., to respond to user requests and schedules, to process input data, to store some data for long periods, and to communicate informative results to the users; at times the software will prompt the users to perform manual processes System Design and Engineering in Health Care 235 ââ€"  Customers: The users who interact with the software and hardware of the system, issue requests, and use the results or forward them to others; there will be other users who are concerned with providing input, system operations, backup, and maintenance The role of a computer is, broadly speaking, the conversion of data into information. Every piece of data must be supplied by a person, by another computer system, or by data collection  equipment, as seen in patient monitoring (see Chapter 17). Information that is output is delivered to health care professionals or becomes input to another computer system. In other words, a medical computer system is a module within the overall health care delivery system. The overall health care system not only determines the need for the computer system (e.g., which data must be processed and which reports must be generated) but also the requirements for the system’s operation (e.g., the degree of reliability and responsiveness to requests for information). Acquisition and operation of a computer system has implications for the organization of an institution. Who controls the information? Who is responsible for the accuracy of the data? How will the system be financed? The installation of a computer system has sociological consequences as well. The introduction of a new system alters the work routines of health care workers. Furthermore, it may affect the traditional roles of health care workers and the existing relationships among groups of individuals—e.g., between physicians and nurses, between nurses and patients, and between physicians and patients. Important ethical and legal questions that arise include the confidentiality of patient information, the appropriate role of computers in patient care (especially in medical decision making), and the responsibility of developers and users for ensuring the correct operation of the system (see Chapter 10). Although the technical challenges in system development must be met, organizational factors are crucial determinants of the success of a computer system within the institution. These factors can differ greatly among institutions and can make the transfer of a well-functioning system to another site difficult. 6.1.2 Functions of a Computer System Computers have been used in every aspect of health care delivery, from the simple processing of business data, to the collection and interpretation of physiological data, to the education of physicians and nurses. Each chapter in Unit II of this book describes an important area for the application of computers in biomedicine. The unique characteristics of each problem area create special requirements for system builders to address. The motivation  for investing in these applications, however, is the computer’s ability to help health professionals in some aspect of information management. We identify eight topics that define the range of basic functions that may be provided by medical computer systems: 1. Data acquisition and presentation 2. Record keeping and access 3. Communication and integration of information 4. Surveillance 5. Information storage and retrieval 6. Data analysis 7. Decision support 8. Education .

Explain about this picture using roland barthes Essay

Explain about this picture using roland barthes - Essay Example The coastal background of the picture is ideal; tourist can have a cool breeze at the coastline of any ocean or sea. In addition, human beings can manifest the world through pictures, not just through photojournalism (Watson, 2012). Our snaps are a perfect example of how human beings can view the world as a social construct or our personal, individual life. The picture’s relevance can be drawn from the context in which it was taken. Denotative quality of the photograph is portrayed by the human being and the coastal objects contained in the photograph and their relationship with the human being. Denotatively, human beings can find coastline settings ideal for holidays and tourism activities. Tourism is also important for economic growth as well as contributing to employment opportunities. The content of the photograph’s message shows the literal reality of how human beings enjoy nature. The scene is real and not imaginary (Noth, 1995). A photograph is a proof that the holiday adventure occurred in reality. The picture may be distorted; however, there is some evidence that something occurred, which resembles the picture. The notion of style in the picture is evident because it represents reality. The object (human being and the coastline) are objects from reality. The pose in the picture represents how human beings can enjoy the sunshine at the coast. In addition a relaxed pose shows how holiday experiencing can be fulfilling. Stress levels can be reduced when human beings find time to relax and be away from work. Holiday activities rejuvenate strength lost during work. After leisure or holiday, more effort can be achieved at work. Use of communication technologies such as phones helps to get in touch with families and friends. The picture’s background also shows how human beings should relate with the environment. The coastal background is clean and free from waste. Waste disposal to the

OSMOREGULATION IN CLAMWORMS Essay Example | Topics and Well Written Essays - 1250 words

OSMOREGULATION IN CLAMWORMS - Essay Example They are the large common estuarines. They are also found on the brackish waters. (Oglesby, 1968). Now they are also found at Africa, coastal Europe and Southern Australia. They grow to a height of 190 mm and lives for one year. They reproduce sexually. The most important characteristic of this species is that they are able to withstand the temperature range of 12 - 35Â °C and survive at a salinity range of 65 ppt for long time and 80 ppt for short time. They are good osmoregulators. Osmoregulation is na active regulation of the osmosis pressure of the body fluids (mainly water) with that of the environmental conditions. Osmosis is maintained both by the terrestrial and marine animals. They do so by excretion through the organs such as kidney and skin. Osmoregulation is of two types, they are osmoregulators and osmo conformers. Osmoregulators are strict regulators of salt and water concentration in the body to that of the environment. osmoconformers match their body fluid concentrat ion to that of the environment.(Masterson, 2008). Neries virens species is able to withstand the salt water content from 5 % to 100%. Some studies have found that they are also able to withstand twice the salt concentration that of salt water. They are only slightly hyperosmotic whereas most of the worms are in osmotic equilibrium with the sea. Review of literature: The body fluids of Nereis are isoosmotic for the sea water. Osmoregulation is one of the important functions of the gut, dorsal pores and the body surface. The salts are transported by active transport and the water by osmosis. Osmosis is the movement of the water (solvent) from high concentration to low concentration across a semi permeable membrane. Here the cell membrane acts as the semi permeable membrane. The influence of the sea water on the weight of the body. The greater the dilution, the greater the increase in the body weight. The worm tends to accommodate itself to the new environment. After the increase in th e body weight, they tend to return back to the normal weight if they are left in the original sea water. These euryhaline osmoregulators are thus capable of surviving in reduced, increased salinity levels. They are found to show two types of blood osmo regulation. First they act as hyper osmotic in the diluted sea water with greater osmo regulatory control. Two important mechanisms are stated for this hyper osmotic capability. The transport of the body salts from the body surface to the body fluid through the medium. The second mechanism is by the reduction of the permeability of the body surface to the solutes and solvents. (Oglesby, 1968). For increasing salt concentrations of upto 2 times the salt concentration they act as hypo- osmotic. The concentration of salt in sea water is 1000 m – Osmole / liter and the blood of Nereis contains about 340 – 500 m – Osmole / liter at marine conditions and 280 – 360 m – Osmole / liter at the fresh water leve ls. The pH of the coelomic fluid was found to increase as the salinity of the water increases. If the salt concentration is higher at the outer environment, the water moves out of the body of the Nereis and thus loses its weight in order to maintain the osmotic pressure as constant. They adapt to the environment very quickly because of the well developed excretory organs. Pronephridia are the excretory and osmoregulaatory organs that are able to drive out the excess water and the waste products. (Whitton, 1975). Another study investigated the osmotic stress due to the long term assimilation and short term assimilation of salinity changes. A single worm was exposed to different salt concentration at different time intervals for a period of 14 days and the changes in weight were measured at continuous time intervals. Another worm

Demonstrate how you would plan the development of a corporate Assignment

Demonstrate how you would plan the development of a corporate communications strategy - Assignment Example Further, the main purpose of devising a corporate communication strategy is to deliver the company’s message to internal and the external audience (Steyn, 2000). Prior to defining the objectives of the company’s corporate communication strategy, it is essential to critically analyse the company’s profile and current organizational achievements. For this purpose SWOT analysis may be performed, to understand company’s strengths, weaknesses, opportunities, and the future targets of the company. Moreover, a PEST analysis must also be performed to grab an overview of the environment in which the company plans to survive and succeed (Cornelissen, 2014). The first and the foremost objective of the communication strategy is to devise a message that it wants to deliver to its audience. The audience is divided into two groups that are internal audience and the external audience. The sole purpose of devising a corporate communication strategy for a company is to pave the way for the flow of information. As suggested earlier, there are two groups of audiences that are dealt by the company, and they are the internal audience and the external audience (Steyn, 2004). The internal audience include employees, investors, partners, suppliers, and other stakeholders. The external audience include governmental and nongovernmental organisations, general public, and other private companies. Communication with the internal audience is carried out at two steps (Steyn, 2012). The first step is of informing and developing knowledge and skills among the members of the organisation. The second step includes convincing the investors, bargaining with the suppliers, and satisfying the stakeholders of the company. For this purpose, one could suggest regular surveys at an organizational level, and periodical reports of the company’s performance over six or twelve months. Fu rther, the company may acquire the help of business consultants to evaluate its

Researching a Critical Social Issue in Computerization Term Paper

Researching a Critical Social Issue in Computerization - Term Paper Example With the same inspiration, the chosen book encompasses details about the journey of technology and how it has successfully made mankind its slave rather than the opposite. Neil Postman was a technology critic, who doesn’t favor the uncontrolled growth of technology and the reliance on technology more than human intellect and judgments. His book â€Å"Technopoly† has addressed various professions ranging from medicine to education, advertising to business management etc. The current technological trends are troubling and causing impact on the lifestyle of individuals, culture, language and personal relations. Its gradual invasion has been unnoticed by many and has just been accepted as the eventual change of times. However, some people, like the author of the book, are conscious about the changes and try to repel them as much as possible to ensure that they are not overpowered by it. The book stresses on few main adverse effects that have been discussed in the paper. B. Main Concepts from the Book The book explains the gradual technological changes that have taken place in the history of mankind; the main factors that are considered harmful by Neil Postman are: Effects on cultural values Effects on human intellect Effects on social capabilities These three aspects are very important as they effect the social and mental development of humans, alongside the morals and traditions of societies. The power of technology overpowers the intellect of humans, changes cultural values and reduces the need for personal relations. These effects will be discussed in detail in the later sections of the report. These changes have not been sudden. On the contrary, man has witnessed varying degrees of integration of technology with the passage of the years. The author termed these changes as â€Å"ecological† i.e. the original form of something is altered due to some change. The author categorizes the changes into three main eras; tool-using culture, technocra cy and technopoly. Tool-using culture has been defined as the era in which tools were invented to solve problems. The tools did not threaten the cultures, traditions and mental capabilities of humans. Technocracy saw the integration of technology in the lives of the individuals; however industrialism and technical incorporation were still not strong enough to drive away culture, language and morals. Technopoly is explained as the prevailing era in which technology has overpowered human intellect as machines are considered more reliable than humans. It is due to the technological integration in the society that machines are considered more dependable than humans. 1. Effects on human intellect The advent of scientific management took place in 1911 by Frederick Taylor. The principles of scientific management were originally developed for the production processes in industries but soon the respective concept intervened in the whole society and started being followed religiously by peopl e who weren’t even a part of the industrial sector. Scientific management provoked the employees to perform their jobs strictly according to the rules and laws that had been laid down for their specific positions. This created the dependence on technology and freed the people from the responsibility of thinking creatively and making

Responding to Global Warming Term Paper Example | Topics and Well Written Essays - 4000 words

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Rhetorical Analysis on Jfks Speech Essay Example for Free

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