摘要:

We consider ammachine stochastic flow-shop and a set of n jobs, with known release dates, to be processed. In this paper, we distinguish two types of random events: processing times (job processing times are random variables which follow a probability distribution function) and breakdowns (time between failure and repair time are random variables). The main purpose of this paper is to review and to propose a classification for some developments about the static stochastic flow-shop scheduling problem. We propose also an extension of the notation of Graham, Lawler, Lenstra, and Rinnooy Kan in order to take into account random events.

ISSN:1246-0125    

DOI:10.1080/12460125.2000.9736710

出版商:Taylor & Francis Group    

年代:2000

数据来源: Taylor

摘要:

Globalization and competitive pressure yield increasing volatility and uncertainty for business. Firms face a variety of risks - legal, environmental, and competitive. The mechanisms employed to deal with such risks are usually concerned with strategy and planning, however another way is to ensure flexibility. This paper briefly reviews the background to the increasing need to manage business risk. Information systems can be a means for risk management by enabling organisations to be flexible. While there is some discussion of IT as allowing flexibility, there is no investigation of the role of specific technologies such as decision support systems (DSS). Using a variety of examples, this contribution argues that DSS may be an enabler of flexibility, and hence a tool for business risk management. The paper investigates the role of DSS in enabling time, range, intention and focus flexibility and in the metrics that contribute to these elements, namely efficiency, responsiveness, versatility and robustness. It demonstrates that DSS enable some of them, but are poor at supporting others.

ISSN:1246-0125    

DOI:10.1080/12460125.2000.9736707

出版商:Taylor & Francis Group    

年代:2000

数据来源: Taylor

摘要:

Two decision support systems were developed in order to help managers of small firms. The first is an inventory decision support system that utilizes both the fixed quantity model, the fixed period model, as well as forecasting techniques both for new and old products. The second is a support system for field (customer) service which utilizes a queueing network model and a simulation model. Both models are useful tools for strategic allocation of resources by a field (customer) service manager in order to improve customer service.

ISSN:1246-0125    

DOI:10.1080/12460125.2000.9736708

出版商:Taylor & Francis Group    

年代:2000

数据来源: Taylor

摘要:

To better quarter personnel, the Department of Defense (DOD) has entered into experimental joint ventures with private developers to construct attractive housing projects on military installation property. A decision support system, called the Housing Revitalization Support Office System (HRSOS), has been developed to support the financial analysis of the joint ventures. By improving the analysis, this system is expected to save the DOD about $600,000 above design, development, and maintenance costs during the demonstration phase of the privatization program. To obtain the benefits, the HRSO experience suggests that DSS design, development, and implementation should be a team effort through an adaptive design strategy. It also indicates that an integrated suite of software development and implementation tools, offering rapid prototyping, computer assisted software engineering, and object-oriented analysis, can promote this strategy.

ISSN:1246-0125    

DOI:10.1080/12460125.2000.9736709

出版商:Taylor & Francis Group    

年代:2000

数据来源: Taylor

摘要:

Interpretating weak signs of business intelligence is an ill-structured problem encountered by many companies' managers. Those managers do not know how to interpret weak signs in order to extract meaning from anticipatory and fragmentary information elements. Surveys and action researches performed by our team confirm this problem and therefore, it becomes our main research focus. Because there is little underlying theory available on the subject, the design of a system helps to collect the reactions of end-users and to pick up relevant observations with a view to increase the understanding both weak sign interpretation and the business intelligence process. The method, the system and the issues that emerge from their validation are described.

ISSN:1246-0125    

DOI:10.1080/12460125.2000.9736711

出版商:Taylor & Francis Group    

年代:2000

数据来源: Taylor

摘要:

This paper tackles the physical organisation of commercial spaces and more particularly, merchandising issues. Practically, this work consists in optimising the localisation of different offers according to their functional interdependencies. After a mathematical formulation of this NP-complete problem, we propose a working protocol based on two heuristic procedures, one by using simulated annealing techniques and another one by using genetic algorithms.

ISSN:1246-0125    

DOI:10.1080/12460125.2000.9736712

出版商:Taylor & Francis Group    

年代:2000

数据来源: Taylor

摘要:

This paper proposes a common indicator of robustness for two classical choice functions (Maximin and Borda) regarding a variation of the weights of the criteria. After a few recalls, we shall present simple similar indicators (one for each function) that allow the measurement of the “local” robustness of the functions, i.e. for one given function, the comparison of the robustness in two different points. These local indicators induce the principle of a global indicator, the value of which can be evaluated through a class of random profiles. We discuss the relevance of the proposed indicators. We also validate an hypothesis according to which Maximin would be more robust than Borda regarding a variation of the weights of the criteria.

ISSN:1246-0125    

DOI:10.1080/12460125.2000.9736713

出版商:Taylor & Francis Group    

年代:2000

数据来源: Taylor

摘要:

Observation of social and economic trends has led the Syndicat des Transports Parisiens (STP, the Paris transport authority) to re-examine the ticket price system as it is today. Reform of this system will involve many stakeholders in the transport sector, whose interests are not necessarily the same. They must participate in this project so that a future ticket pricing structure can be accepted by all. Therefore all actors involved must be able to take part in the study which will precede the decisions With this in mind, the STP has called for a methodological study in order to evaluate the impact of ticket price changes based on zoning. The main lines of research concern three phases: (1) definition and evaluation of zoning choices in the Ile-de-France area, (2) quality analysis of potential offer and demand in the areas selected, and (3) evaluation and comparison of the various ticket pricing hypotheses. This methodology is based on a software which will be the basis for analysis and dialogue between the stakeholders involved in ticket price changes. This software must allow, firstly, input, evaluation, modification and comparison of zoning choices, and secondly, it must allow to analyse the transport offer and the potential demand for each zoning choice in order to design and evaluate the impact of a ticket pricing scenario applied to the zoning choice on the basis of hypothetical traffic flow evolution.

ISSN:1246-0125    

DOI:10.1080/12460125.2000.9736714

出版商:Taylor & Francis Group    

年代:2000

数据来源: Taylor