1、Managemengt Information Systems By a management information system,we propose the follow alternate definition: an integrated uer/machine system (usually computerized) for providing information to support decision making in an enterprise. The key elements of this definition are An integrated uer/mach
2、ine system For proving information To support decision making In an enterprise A management information system utilizes Computer hardware and software Manual procedures Models for analysis A database Just as there is a logical flow of materials in the creation of a product, there is logical flow of
3、information in a management information system.In manufacturing,raw materials move through a process that transforms the raw materials into usable products. In a similar fashion, in an information system,data are supplied to a system(input), the data are manipulated(processed),and they are transform
4、ed into information(output).In its simplest form ,a management information systemed may be depicted by an input-process-output(IPO) model (Fig.10.1). An understanding of this model is worthwhile becaue it can be used to represent all MISs.Note in that figure that the MIS, through its processing tech
5、nology (of collecting, coding,storing,processing,decoding,and reporting), transforms the data coming into an enterprise into usable information. Fig.10.1 An Input-Process-Output Medel of a Management Information System We may further enhance our understanding of management information systems by dis
6、cussing their general function and major elements. These systems exist in most enterprises, whether public or private, primarily to assist management in improving revenues, reducing costs and managing assets. Therefore, improving the performance of an enterprise is the ultimate objective of manageme
7、nt infoemation systems- not the storage of data, the generation of reports,or even”getting the right information to the right person at the right time.” And MIS can best improve an enterprises performance by helping to improve the quality of managerial decisions. Transaction processing (TP), reporti
8、ng systems(RS), and decision-support systems(DSS) are the major elements of a management infortion system.The primary role of TP in an enterprise is the collection, storage,and processing of Inputs Transforation Process Outputs Information ProcessingTechnology Data data in such a way that transactio
9、ns within an enterprise are described and thus the procedural actions of the enterprise supported .More specifically, a TP system may be viewed as a computer-based means of capturing transaction so that may be recreated. The out of a transaction-processing system includes stored transaction images,
10、documents needed by an enterprise to fulfill its mainstream purposes(invoices,production orders,shipping orders,purchase orders, mailing lists, pay checks, work orders,and so forth), and listings of transaction that have occurred over a period of time (for confirmation or references). Reporting syst
11、ems(RS) and decision-support systems (DSS) often are confused with each other and thus misunderstood. Yet, each has a clear orientation. And distinctions may be drawn in terms of their areas of impact on the payoff to an enterprise and their relevance to a manager. So an RS provides standardized rep
12、orts based on well-known policies, procedures, and rules. And a DSS provides information to help management with new , unstructured decision making. A pyramid may be used to illustrate the dimensions of an information system(Fig.10.2).The vertical dimension represents the levels of management (first
13、-line, middle, and top management) , and the horizontal dimension represents the main functional areas of a business firm (for example, marketing, production, and finace).The depth dimension indicates the major management information systems that provide support for managerial activities: the structured and required reporting systems(RS) and decisionmaking system(DSS) . These
