Management Science
0025-1909
1526-5501
Mỹ
Cơ quản chủ quản: INFORMS Institute for Operations Research and the Management Sciences , INFORMS
Lĩnh vực:
Strategy and ManagementManagement Science and Operations Research
Các bài báo tiêu biểu
User Acceptance of Computer Technology: A Comparison of Two Theoretical Models Computer systems cannot improve organizational performance if they aren't used. Unfortunately, resistance to end-user systems by managers and professionals is a widespread problem. To better predict, explain, and increase user acceptance, we need to better understand why people accept or reject computers. This research addresses the ability to predict peoples' computer acceptance from a measure of their intentions, and the ability to explain their intentions in terms of their attitudes, subjective norms, perceived usefulness, perceived ease of use, and related variables. In a longitudinal study of 107 users, intentions to use a specific system, measured after a one-hour introduction to the system, were correlated 0.35 with system use 14 weeks later. The intention-usage correlation was 0.63 at the end of this time period. Perceived usefulness strongly influenced peoples' intentions, explaining more than half of the variance in intentions at the end of 14 weeks. Perceived ease of use had a small but significant effect on intentions as well, although this effect subsided over time. Attitudes only partially mediated the effects of these beliefs on intentions. Subjective norms had no effect on intentions. These results suggest the possibility of simple but powerful models of the determinants of user acceptance, with practical value for evaluating systems and guiding managerial interventions aimed at reducing the problem of underutilized computer technology.
Tập 35 Số 8 - Trang 982-1003 - 1989
A Theoretical Extension of the Technology Acceptance Model: Four Longitudinal Field Studies The present research develops and tests a theoretical extension of the Technology Acceptance Model (TAM) that explains perceived usefulness and usage intentions in terms of social influence and cognitive instrumental processes. The extended model, referred to as TAM2, was tested using longitudinal data collected regarding four different systems at four organizations (N = 156), two involving voluntary usage and two involving mandatory usage. Model constructs were measured at three points in time at each organization: preimplementation, one month postimplementation, and three months postimplementation. The extended model was strongly supported for all four organizations at all three points of measurement, accounting for 40%–60% of the variance in usefulness perceptions and 34%–52% of the variance in usage intentions. Both social influence processes (subjective norm, voluntariness, and image) and cognitive instrumental processes (job relevance, output quality, result demonstrability, and perceived ease of use) significantly influenced user acceptance. These findings advance theory and contribute to the foundation for future research aimed at improving our understanding of user adoption behavior.
Tập 46 Số 2 - Trang 186-204 - 2000
Some Models for Estimating Technical and Scale Inefficiencies in Data Envelopment Analysis In management contexts, mathematical programming is usually used to evaluate a collection of possible alternative courses of action en route to selecting one which is best. In this capacity, mathematical programming serves as a planning aid to management. Data Envelopment Analysis reverses this role and employs mathematical programming to obtain ex post facto evaluations of the relative efficiency of management accomplishments, however they may have been planned or executed. Mathematical programming is thereby extended for use as a tool for control and evaluation of past accomplishments as well as a tool to aid in planning future activities. The CCR ratio form introduced by Charnes, Cooper and Rhodes, as part of their Data Envelopment Analysis approach, comprehends both technical and scale inefficiencies via the optimal value of the ratio form, as obtained directly from the data without requiring a priori specification of weights and/or explicit delineation of assumed functional forms of relations between inputs and outputs. A separation into technical and scale efficiencies is accomplished by the methods developed in this paper without altering the latter conditions for use of DEA directly on observational data. Technical inefficiencies are identified with failures to achieve best possible output levels and/or usage of excessive amounts of inputs. Methods for identifying and correcting the magnitudes of these inefficiencies, as supplied in prior work, are illustrated. In the present paper, a new separate variable is introduced which makes it possible to determine whether operations were conducted in regions of increasing, constant or decreasing returns to scale (in multiple input and multiple output situations). The results are discussed and related not only to classical (single output) economics but also to more modern versions of economics which are identified with “contestable market theories.”
Tập 30 Số 9 - Trang 1078-1092 - 1984
Organizational Information Requirements, Media Richness and Structural Design This paper answers the question, “Why do organizations process information?” Uncertainty and equivocality are defined as two forces that influence information processing in organizations. Organization structure and internal systems determine both the amount and richness of information provided to managers. Models are proposed that show how organizations can be designed to meet the information needs of technology, interdepartmental relations, and the environment. One implication for managers is that a major problem is lack of clarity, not lack of data. The models indicate how organizations can be designed to provide information mechanisms to both reduce uncertainty and resolve equivocality.
Tập 32 Số 5 - Trang 554-571 - 1986
Decision-Making in a Fuzzy Environment By decision-making in a fuzzy environment is meant a decision process in which the goals and/or the constraints, but not necessarily the system under control, are fuzzy in nature. This means that the goals and/or the constraints constitute classes of alternatives whose boundaries are not sharply defined. An example of a fuzzy constraint is: “The cost of A should not be substantially higher than α,” where α is a specified constant. Similarly, an example of a fuzzy goal is: “x should be in the vicinity of x0 ,” where x0 is a constant. The italicized words are the sources of fuzziness in these examples. Fuzzy goals and fuzzy constraints can be defined precisely as fuzzy sets in the space of alternatives. A fuzzy decision, then, may be viewed as an intersection of the given goals and constraints. A maximizing decision is defined as a point in the space of alternatives at which the membership function of a fuzzy decision attains its maximum value. The use of these concepts is illustrated by examples involving multistage decision processes in which the system under control is either deterministic or stochastic. By using dynamic programming, the determination of a maximizing decision is reduced to the solution of a system of functional equations. A reverse-flow technique is described for the solution of a functional equation arising in connection with a decision process in which the termination time is defined implicitly by the condition that the process stops when the system under control enters a specified set of states in its state space.
Tập 17 Số 4 - Trang B-141-B-164 - 1970
Strategic Factor Markets: Expectations, Luck, and Business Strategy Much of the current thinking about competitive strategy focuses on ways that firms can create imperfectly competitive product markets in order to obtain greater than normal economic performance. However, the economic performance of firms does not depend simply on whether or not its strategies create such markets, but also on the cost of implementing those strategies. Clearly, if the cost of strategy implementation is greater than returns obtained from creating an imperfectly competitive product market, then firms will not obtain above normal economic performance from their strategizing efforts. To help analyze the cost of implementing strategies, we introduce the concept of a strategic factor market, i.e., a market where the resources necessary to implement a strategy are acquired. If strategic factor markets are perfect, then the cost of acquiring strategic resources will approximately equal the economic value of those resources once they are used to implement product market strategies. Even if such strategies create imperfectly competitive product markets, they will not generate above normal economic performance for a firm, for their full value would have been anticipated when the resources necessary for implementation were acquired. However, strategic factor markets will be imperfectly competitive when different firms have different expectations about the future value of a strategic resource. In these settings, firms may obtain above normal economic performance from acquiring strategic resources and implementing strategies. We show that other apparent strategic factor market imperfections, including when a firm already controls all the resources needed to implement a strategy, when a firm controls unique resources, when only a small number of firms attempt to implement a strategy, and when some firms have access to lower cost capital than others, and so on, are all special cases of differences in expectations held by firms about the future value of a strategic resource. Firms can attempt to develop better expectations about the future value of strategic resources by analyzing their competitive environments or by analyzing skills and capabilities they already control. Environmental analysis cannot be expected to improve the expectations of some firms better than others, and thus cannot be a source of more accurate expectations about the future value of a strategic resource. However, analyzing a firm’s skills and capabilities can be a source of more accurate expectations. Thus, from the point of view of firms seeking greater than normal economic performance, our analysis suggests that strategic choices should flow mainly from the analysis of its unique skills and capabilities, rather than from the analysis of its competitive environment.
Tập 32 Số 10 - Trang 1231-1241 - 1986
The Correlates of Entrepreneurship in Three Types of Firms The objective of the research was to discover the chief determinants of entrepreneurship, the process by which organizations renew themselves and their markets by pioneering, innovation, and risk taking. Some authors have argued that personality factors of the leader are what determine entrepreneurship, others have highlighted the role played by the structure of the organization, while a final group have pointed to the importance of strategy making. We believed that the manner and extent to which entrepreneurship would be influenced by all of these factors would in large measure depend upon the nature of the organization. Based upon the work of a number of authors we derived a crude typology of firms: Simple firms are small and their power is centralized at the top. Planning firms are bigger, their goal being smooth and efficient operation through the use of formal controls and plans. Organic firms strive to be adaptive to their environments, emphasizing expertise-based power and open communications. The predictiveness of the typology was established upon a sample of 52 firms using hypothesis-testing and analysis of variance techniques. We conjectured that in Simple firms entrepreneurship would be determined by the characteristics of the leader; in Planning firms it would be facilitated by explicit and well integrated product-market strategies, and in Organic firms it would be a function of environment and structure. These hypotheses were largely borne out by correlational and multiple regression analyses. Any programs which aim to stimulate entrepreneurship would benefit greatly from tailoring recommendations to the nature of the target firms.
Tập 29 Số 7 - Trang 770-791 - 1983
A New Product Growth for Model Consumer Durables A growth model for the timing of initial purchase of new products is developed and tested empirically against data for eleven consumer durables. The basic assumption of the model is that the timing of a consumer's initial purchase is related to the number of previous buyers. A behavioral rationale for the model is offered in terms of innovative and imitative behavior. The model yields good predictions of the sales peak and the timing of the peak when applied to historical data. A long-range forecast is developed for the sales of color television sets.
Tập 15 Số 5 - Trang 215-227 - 1969
An Experimental Application of the DELPHI Method to the Use of Experts This paper gives an account of an experiment in the use of the so-called DELPHI method, which was devised in order to obtain the most reliable opinion consensus of a group of experts by subjecting them to a series of questionnaires in depth interspersed with controlled opinion feedback.
Tập 9 Số 3 - Trang 458-467 - 1963
Central Problems in the Management of Innovation Innovation is defined as the development and implementation of new ideas by people who over time engage in transactions with others within an institutional order. This definition focuses on four basic factors (new ideas, people, transactions, and institutional context). An understanding of how these factors are related leads to four basic problems confronting most general managers: (1) a human problem of managing attention, (2) a process problem in managing new ideas into good currency, (3) a structural problem of managing part-whole relationships, and (4) a strategic problem of institutional leadership. This paper discusses these four basic problems and concludes by suggesting how they fit together into an overall framework to guide longitudinal study of the management of innovation.
Tập 32 Số 5 - Trang 590-607 - 1986