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When using acceleration in a degradation test, additional parameters are needed to incorporate the accelerating variables into the degradation process, requiring more statistical information to achieve the same level of estimation precision. When the increase of statistical information due to acceleration fails to compensate the information consumption caused by the additional parameters, acceleration...
We need energy resources to assure performance of mechatronic systems. The performance assurance is of major importance in present systems since it leads to high availability and capability. It also helps to reduce failure occurrence. In the article we want to find the up state time of Li-ion batteries. Results are related to influence of the operating environment at different climatic levels. We...
This paper presents a study on the relationships between leadership, quality of teamwork and goal achievement in production teams. Hypotheses regarding the relations between the constructs were postulated based on literature and results of previous research. A survey of employees working in teams within a production plant of a car manufacturer was conducted. In order to test the hypothesis, a structural...
As battery electric vehicles are more and more popular nowadays, this paper presents an Electric Vehicle Routing Problem with Time Windows and Battery Swapping Stations to extend their range of application. In the problem, a fleet of the same kind of battery electric vehicles will fulfill the demand of all customers within the serving area by means of delivery operation with a fixed battery swapping...
A method fusing life data and expert information was proposed to estimate residual life of some kinds of single machine on satellite platform, which solved the problem that performance degradation information of these products could not be detected real-time and the life data collected were almost no-failure data. Firstly, expert information about reliability was transformed into prior distributions...
Cellular transport systems are a field of research which has received some attention over the last few years. As a recently established topic, a large share of the current research is directed at fundamental topics dealing with the system's design and construction. Answer set programming, on the other hand, has been established in the early 90s and received steadily rising attention from thereon....
A divide between design and engineering in both knowledge management literature and industrial practices has received the renewed attention. The knowledge gap has caused extended usage of resources for tracking the correct information and verifying requirements during a system design or redesign process to date. The late-design changes, due to missing information or new requirements in developing...
The production planning and control process is performed within complex and dynamic organizations made up of customer expectations, equipment, materials, people, information, and technologies. Changes in both internal and external factors can create a variety of unforeseen events, which make initial plans unfeasible or obsolete during production execution. How to effectively handle the unscheduled...
Lean management philosophy (LMP), which arose from the discrete manufacturing industry, is currently being adapted to service-providing organizations. The healthcare organizations currently need to improve productivity, especially in the area of the identification and elimination of waste. This manuscript presents a case study carried out in a cardiology clinic. A ‘family of services’ has been identified...
The operational efficiency of surgical rooms has a significant influence on the overall performance of a hospital. In this study, we used a multiple regression model to identify the influence of factors on the operational efficiency of surgical rooms. We analyzed the patient flow in the surgical room to identify the potential influencing factors in terms of patients, surgical type, medical staff,...
Job idiosyncrasy refers to deviations between formal and actual job design, attributable to changes by the job incumbents. Research on idiosyncratic deals (i-deals) focusses on special arrangements negotiated by individual employees with employer representatives (e.g., supervisors, management). This structure-oriented analysis examined the role of hierarchical status in negotiating personalized work...
In recent years the numbers of out of shelves books in the Surabaya's universities library is decreasing. This is not a surprising phenomenon. The digital natives, as the primary customers of the library, are generation which always connect to the world through their gadgets. Library which in the past was the solely place for searching the information is no longer the source of finding the information...
The paper investigates differences in data gathering and preparation of the workplace environment for virtual ergonomic analyses. The two investigated scenarios are classical digitization of the workplace by measurement of dimensions and subsequent modelling of the workplace in 3D drawing software compared to 3D scanning of the workplace by an industrial scanner. Those two scenarios are assessed in...
We consider the multidimensional knapsack problem (MKP) with min-max regret criterion under interval profits. We examine three typical algorithms widely applied for min-max regret criterion: fixed-scenario approach, Benders-like decomposition and branch-and-cut. We further propose a new heuristic framework, which we call the iterated dual substitution algorithm. Computational experiments on a wide...
Parallel machine scheduling problems have long been studied due to their importance in manufacturing and planning. We consider the identical parallel machine scheduling problem with sequence-dependent setup times and the job splitting property. Jobs can divided into sections which can be assigned to different machines simultaneously. A setup time is required between any two job sections. The aim is...
The Thai power industry has a partial liberalization structure, which encourages a partial competition under supervision of the Thai Department of Energy. To this end, the author proposes a mathematical model with equilibrium constraints (MPECs) whose upper-level problem depicts a stated-owned utility, the Electricity Generation Authority of Thailand (EGAT), deciding on optimal power generation capacities...
This paper proposes a state space model to describe multivariate autocorrelated zero-inflated count series. The model extends the classical zero-inflated Poisson distribution into multivariate cases but is able to impose different zero inflations on different dimensions. Combing the zero inflation with the log-normal mixture of independent Poisson distribution, this model allows for flexible cross-correlations...
Product program optimization gains increasing relevance in industrial practice, due to rising number of variants in the context of product individualization. The definition of a product platform for several products of the program is a promising measure to reduce internal variety for the company. However, decisions for the right platform concept are challenging. Therefore, this publication aims to...
Open source software are used in wide ranging areas of software system development, because of the standardization, cost reduction, quick delivery. Many open source software are useful for the software developer and software managers to develop the software system quickly. Also, the open source software are characterized by the bug tracking system (BTS). The BTS's such as Bugzilla are controlled by...
The areas of interest for the maintenance policy selection process are widely known to be related to the financial aspects, availability concerns. Also, practical criteria are arising such as the applicability of the maintenance policy, quality improvement, and safety requirement, etc. An assessment approach of the different maintenance policies (corrective, systematic or conditional preventive, predictive,...
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