This paper presents a model for deterioration and repair of a railway line. The critical failure is “broken line”. Two main failure mechanisms are considered: either shock failure, i.e. an immediate critical failure (without “warning”), or the critical failure occurs as the result of a degradation process, i.e. a degraded failure (crack) occurs first. Various types of inspection and maintenance...

| Relationships among di erent modeling perspectives have been systematically investigated focusing either on given notations (e.g. UML) or on domain reference models (e.g. ARIS/SAP). In contrast, many successful informal methods for business analysis and requirements engineering (e.g. JAD) emphasize team negotiation, goal orientation and exibility of modeling notations. This paper addresses th...

This paper presents a generic modeling framework to simultaneously decide about production quantities and maintenance operations for a capacitated resource facing a dynamic demand for different types of products. As the resource needs to be setup for each specific type of product, a lot-sizing problem occurs. In addition it is assumed that production causes intensive wear and tear. For this rea...

The object-oriented modeling has been largely adopted in industry in the last years. Several systems built 4 or 5 years ago may need an adaptive maintenance process in order to better satisfy market and customer needs. In this paper1, a model for effort estimation/prediction of the adaptive maintenance is presented. A selection of metrics for effort estimation has been applied to the general mo...

Recently, many studies of generating dynamically consistent motion of human-like models have been made in several areas. A study of balance maintenance is one of the most important topics in these areas. In this paper, we describe how to model motion of balance maintenance by humans against sudden and large perturbation, along with a method for generating balance maintenance motion by a human-l...

This thesis presents an application of Work Domain Analysis (WDA) to the domain of Winter Road Maintenance Operation (WRM). WDA is the first phase of Cognitive Work Analysis (CWA), a methodology for analyzing complex socio-technical systems. WDA can help to structure system information in a manner that is meaningful for decision making and computer-based information system design. The Abstracti...

To cope effectively with high levels of requirement volatility and frequent system change, practitioners have increasingly adopted iterative and agile methodologies in Web development and maintenance. Despite the increasing acceptance in the agile methods, empirical evidence of its effectiveness is mainly anecdotal. There is a need to understand the dynamic process of agile methodologies throug...

Component-level predictive maintenance schedules are developed to maximize multi-state system lifetime, considering degrading component multi-state behavior. To maximize the system time-to-replacement, the predictive maintenance schedule is based on individual component performance degradation trends, system performance requirements and component maintenance thresholds. This work is an extensio...

the aim of this study was to develop an optimal sustainable forest plantation based on goal programming and analytic hierarchy process (ahp) methods. this study was carried out in guilan province, north of iran. first of all, the ecological capability of the study area for plantation establishment/maintenance was evaluated based on multi-factor method and specific ecological makhdoum model by m...