The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
In this research, we study a scheduling problem in mail-order pharmacy automated distribution (MOPAD) system. In MOPAD scheduling, two kinds of objective: the collation delay (CD) and makespan, should be considered and in the previous study of some of authors three kinds of genetic algorithms (GA) are applied and evaluated. In this paper, we apply constraint programming (CP) for the scheduling problem...
Globalization and highly competitive business environment are pushing many organizations to realize numerous productivity improvement efforts in order to continue to survive. To gain competitive advantage, manufacturing organizations are compelled to adopt productivity enhancement programs such as total quality management (TQM), total productive maintenance (TPM), lean manufacturing concept to achieve...
Resilience evaluation and enhancement has become a vital issue concerning the effectiveness of a current supply chain. This research paper proposes a multi-tier supplier selection policy for resilience enhancement as well as a customer-service-level oriented resilience measurement approach using on-time delivery rate as the indicator. A simple case study involving main supplier failure disturbance...
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...
In a large scale competition, the number of participants is too large to be completely reviewed by any evaluator, so dividing entire participants into several groups such that each of the evaluator reviews only a group serves as an alternative. However, in this case, an evaluator reviews and ranks only a portion of participants and the final result might be distorted. The focus of this study is on...
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...
Sustainable development requires the transformation of societies into knowledge societies. ICTs are increasingly becoming repositories of knowledge and information, which has implications for the field of knowledge management. In this paper, we attempt to conduct a preliminary analysis to identify the factors that influence the sustainability of knowledge societies. A Knowledge Societies Index (KSI)...
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...
Disassembly planning aims to determine the quantity of end-of-life products in order to satisfy the demand of leaf items over a given planning horizon while minimizing several costs. Disassembly planning problem with two levels, multi-products type and capacity constraints is treated by developing a linear programming model. The objective of this model is to minimize the sum of the fixed costs of...
U-shaped Assembly Line (UAL) applies the just-in-time principle which decreases the waste in the operations. This paper presents the UAL model which bases on an uncertain task time. It consists of eight certain tasks and three uncertain tasks. The objective function of the model is the minimum number of workstations. The model formulates on a zero-one integer linear programming. The distribution of...
The performance of dispatching rules tends to be state-dependent, and a rule that performs very well under a given set of shop floor conditions may not necessarily perform as well under different conditions. A new composite dispatching rule that scores jobs based on their priorities under five different dispatching rules is proposed. The score-based dispatching rule is evaluated by means of a comparative...
Most existing studies on production scheduling considered only one resource type, usually the machines. But in certain actual manufacturing environments, other resources, such as tools, operators, and so on, may become a scare resource for the short term production scheduling. Therefore, this study investigates the scheduling problem that simultaneously considers machines and their auxiliary tools...
There are three important objectives for the management of apparel production. To maximize the overall throughput of the factory, the first objective is to fully utilize sewing process, the usual bottleneck. The second objective is to maximize the fabric utilization of cut order plan which is determined by the cutting department of a factory. The focus of this study is the third objective which is...
This paper focuses on the production scheduling problem in a rotor workshop. The scheduling problem is formulated as a reentrant hybrid flow shop problem with non-identical machines in parallel. Some heuristics are developed to solve the problem. The proposed algorithms are compared through various instances that are generated based on real operations in the workshop. Experimental result also reveals...
As the foremost step for designing a cellular manufacturing system, cell formation is a hard optimization problem. It is necessary and significant to develop methods to find near-optimal solutions in a reasonable time. In this paper, the first hybrid discrete Cuckoo Search (HDCS) algorithm is designed to address the cell formation problem. Alternative process routings and operation sequence of parts...
The aim of this paper is to formulate strategies for Shaanxi Aviation Industrial Upgrading (SXAIU). First, a two-level index system was established by combining literature analysis and Delphi methods, which includes the key success factors and external driving forces affecting Shaanxi aviation industry (SXAI). After that, by using the Theory of Inventive Problem Solving (well-known as TRIZ), these...
End-of-life electronic and electrical waste, referred to as e-waste, has recently formed the rapidest increasing group of waste streams worldwide. Having some well-designed plans for managing this waste is essential. One of the most effective ways is to assess and select the most effective e-waste recycling programs. Since these plans require considering different aspects and criteria, applying multi-criteria...
Overall reliability index is an indicator to manifest the health level of an infrastructure. The introduction of this index can facilitate the maintenance optimization. Railway infrastructure is complex containing a plenty of constituent units and various measurement data. This paper discusses a general approach to combine these various data. A real railway case is presented to demonstrate the development...
Establishment of an improved model for assessing criticality of waste in maintenance operation strongly supports the creation of sustainable manufacturing. However, contribution of previous maintenance engineering studies to above issue is very limited. If any, it is very few intended to create a model for ranking criticality of maintenance waste using risk management tool. In spite of the fact that...
With high consideration of sustainability, product recovery has become a major interest of product manufacturers by retrieving obsolete products. Disassembly processes can make an impact on the product recovery and be necessary to develop sustainable product design by achieving the product recovery strategy. Therefore, this paper proposes a method to assess product disassembly complexity that represents...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.