摘要:

Managing a fleet of vehicles requires procuring and replacing capital equipment like buses or planes that provide transportation services. Replacement costs exhibit economies of scale while maintenance costs exhibit dis-economies of scale. This paper makes three contributions. First, it develops the first formal models for determining optimal steady-state fleei designs. Second, it gives a well-defined and consistent definition of optimality for steady-state fleet designs. Third, it characterizes optimal steady-state fleet designs by showing that all replacement groups must be equally sized. This result makes computing optimal steady-state fleet designs possible since the computational effort is independent of the size of the fleet.

ISSN:0013-791X    

DOI:10.1080/00137919308903089

出版商:Taylor & Francis Group    

年代:1993

数据来源: Taylor

摘要:

This paper presents a case study of an economic justification of an expert system in a large maintenance operation. A simulation model was developed to study the failure modes and operating characteristics of the maintenance operation and the potential impact of installing an expert system. The simulation results are used as inputs to the justification process. The justification approach combines conventional economic analysis with multiattribule utility measures. It was found that overall maintenance cost after an expert system installation was much lower than the cost without expert system installation. Thus, the proposed expert system was economically justified.

ISSN:0013-791X    

DOI:10.1080/00137919308903090

出版商:Taylor & Francis Group    

年代:1993

数据来源: Taylor

摘要:

Conventional NPV formulas suggest that a project's net present value is simply the sum of the present values of its net cash flows. An alternative view sees net present value as the difference between the initial wealth and the present value of the terminal wealth attributable to the project. This “incremental wealth” view requires a generalized formula which provides explicitly for the opportunity costs associated with interim cash flows. This paper discusses the limitations of conventional NPV formulas, the need for a generalized net present value formula, the use of this generalized formula to evaluate financing as well as investment opportunities and the linkage between net present value formulas and rate of return criteria.

ISSN:0013-791X    

DOI:10.1080/00137919308903091

出版商:Taylor & Francis Group    

年代:1993

数据来源: Taylor

摘要:

We define an indexed set (that is, a family) of cost recovery rules, using the concept of an “acceleration index.” All existing cost recovery rules (straight line, sum-of-digits, declining balance, MACRS, etc) are members of this family, and every cost recovery rule is completely specified by its acceleration index. Using acceleration indexes, we describe acceleration relationships among existing rules, and suggest improvements. Examples indicate that this unifying framework would be valuable for designing new, flexible cost recovery rules that may be proposed for future cost recovery legislations and managerial decision making.

ISSN:0013-791X    

DOI:10.1080/00137919308903092

出版商:Taylor & Francis Group    

年代:1993

数据来源: Taylor

摘要:

The Net Present Value (NPV) rule of financial theory gives management a decisive criterion for choosing between abandonment versus continuation of capital projects. There is extensive evidence, however, that management chooses to delay the abandonment of unprofitable projects. This paper attempts to explain management's reluctance to abide by the NPV criterion. The concept of a Reputation Adjusted Net Present Value is introduced in an environment where management knows more about the true value of a project than do stakeholders. The model indicates that, in such an environment, the continuation of a negative NPV project may maximize firm value.

ISSN:0013-791X    

DOI:10.1080/00137919308903093

出版商:Taylor & Francis Group    

年代:1993

数据来源: Taylor

ISSN:0013-791X    

DOI:10.1080/00137919308903094

出版商:Taylor & Francis Group    

年代:1993

数据来源: Taylor

ISSN:0013-791X    

DOI:10.1080/00137919308928033

出版商:Taylor & Francis Group    

年代:1993

数据来源: Taylor

ISSN:0013-791X    

DOI:10.1080/00137919308928034

出版商:Taylor & Francis Group    

年代:1993

数据来源: Taylor

ISSN:0013-791X    

DOI:10.1080/00137919308928035

出版商:Taylor & Francis Group    

年代:1993

数据来源: Taylor