This paper describes two prototype applications based on Virtual Reality (VR) technology for use in construction and maintenance planning of buildings. The first, applied to construction, is an interactive virtual model designed to present plans three-dimensionally (3D), connecting them to construction planning schedules, resulting in a valuable asset to the monitoring of the development of con...

In Australia, railway track maintenance costs comprise between 25-35 percent of total freight train operating costs. Track maintenance planning models have been shown to reduce maintenance costs by 5 to 10 percent though improved planning. This paper describes a model which has been developed to deal with the track maintenance planning function at the medium to long-term levels. This model simu...

Mature infrastructures require proper maintenance treatments. Highway agencies often face with limited maintenance budget which may result a large backlogs of maintenance works in each year. The main objective of this research work is to develop a multi-objective optimization model to support the multi-year decision making process of the highway maintenance management in Thailand. Preventive ma...

Recent changes in legislation have made housing associations (HAS) more financially responsible for all aspects of maintenance of their new housing stock. Because of the levels of funding within HAS and the need to provide accommodation at a "fair rent," the planning of maintenance, and the consequent planning of expenditure has never before been so vital. Moreover, most literature on maintenan...

In designing an assembly product, maintainability is a crucial issue that determines whether certain parts can be accessed for routine maintenance. In the past its study has been largely manual and labor intensive. Either by using physical mockup or computer animation with CAD models of a design, the task relies on human to provide an access path for the part. In this paper we present an automa...

In maintenance of (public) infrastructures, such as the national highway network, an asset manager is responsible for high network quality and throughput, while limiting expenses to a minimum. The maintenance activities, however, are often performed by commercial contractors, mainly driven by profit. Using a network-based payment mechanism we align the objectives of both stakeholders. Nonethele...

We address efficient planning of maintenance activities in infrastructural networks, inspired by the real-world problem of servicing a highway network. A road authority is responsible for the quality, throughput and maintenance costs of the network, while the actual maintenance is performed by autonomous, third-party contractors. From a (multi-agent) planning and scheduling perspective, many in...

The fields of language production and verbal memory have relatively little contact. I argue that utterance planning for language production has substantial memory maintenance demands and that utterance planning provides the maintenance and ordering processes for short-term verbal memory tasks. There has already been some movement toward this view. I discuss benefits to pursuing these links more...

Real world planning tasks like manufacturing process planning often don't allow to formalize all of the relevant knowledge. Especially, preferences between alternatives are hard to acquire but have high innuence on the eeciency of the planning process and the quality of the solution. We describe the essential features of the CAPlan planning architecture that supports cooperative problem solving...

The paper deals with a development of the rolling horizon approach introduced recently for grouping maintenance strategies of multi-component systems by integrating two efficient optimization algorithms. The proposed approach can help to construct an optimal maintenance planning with a given availability constraint under limited repairmen. Thanks to the rolling horizon spirit, the maintenance p...