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The purpose of this paper is to identify areas throughout a product's lifecycle processes where complexity can be reduced by implementing a product configuration system (PCS). As discussed in the literature, several benefits are realized by using a PCS in terms of product and process standardization. This also leads to control and reduce of complexity both in products and processes. To this end, this...
Professional engineering service-delivering firms (PESDFs) that provide knowledge-intensive technical services to oil and gas (O&G) operators are under pressure to deliver their services/products in a more effective and efficient way, especially in the current oil crisis situation. While the objective of the firms is to deliver the highest value to their clients, waste is still embedded in the...
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)...
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...
For hospitals, the variability on demand (number of daily urgent admissions) and the variability in the Length of Stay (LoS) (bed occupancy) may affect the quality of service provided to patients and the effectiveness of the overall service. This paper studies the LoS of 238 patients who performed hip surgery in the orthopedic service of a Portuguese hospital in 2014. It uses variables available in...
Computer Aided Design (CAD) packages are normally bought off-the-shelf for a wide range of engineering disciplines. However, a single system cannot possibly meet requirements of different users as these packages are normally provided with basic primitives but no blocks for quick generations. A case study carried out at a power enterprise in Zimbabwe revealed delays in attending to faults and installations...
Process Improvement is an aspect of organizational development in which a series of actions are taken by a process owner or process analyst to identify, analyze and improve existing business processes within an organization for optimization and to meet new quotas or standards of quality. The shoe industry in Marikina City which is the shoe capital of the Philippines is lagging behind its neighboring...
This manuscript presents the results of experimental investigations which have been carried out to investigate the optimal parameter combination that results in the minimum axial process force (PF) in ultrasonic assisted face grinding (UAFG). A diamond grinding tool (diamond drill) was used in these investigations. The UAFG is a hybrid machining process, which has been used for the machining of advanced...
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...
This paper addresses the implementation of Automated Identification Technologies (AIT) to support and manage the maintenance of repairable equipment and components that are intended for relatively long use in echelon inventory system with the aim of optimizing the data allocation in a given automated identification system. The paper presents the development of general model for optimizing the use...
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...
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...
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 considers a robust approach for an inventory model considering standard and high qualities of a product under price and quantity competitions. In the case the competitive store sells a standard product, another store must decide the purchase volumes, prices and ordering quantities of standard and high quality products in order to manage a loss risk as well as maximize the total profit....
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...
The 1/N portfolio is an equally-weighted portfolio composed of all N stocks from a given investment universe. This portfolio offers an attractive risk-return profile but causes substantial management costs if N is large. Therefore, we consider the problem of optimally tracking the 1/N portfolio by constructing an equally-weighted portfolio composed of a subset of the N stocks. This problem can be...
Due to the increase in air transportation demand, runway capacity is reaching a bottleneck at the international airports, especially during peak hours. Managing on aircraft sequencing or sequencing problems in airport perspective have become a crucial operation nowadays in order to maintain safety landing and utilize the runway facility to handle the schedules for all incoming aircraft under congestion...
The resource transfer problem (RTP) is a generic framework for integrated scheduling and routing problems, which allows for modeling and solving complex scheduling and rich vehicle routing problems as well as their hybrids in a unified way. Many constraints and specific requirements arising in scheduling and routing applications are covered by the RTP. Basically, the problem consists in scheduling...
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...
A cash-constrained two-level supply chain with a supplier and a single retailer facing stochastic demand is considered in this paper. Two different financing strategies are investigated and the resulting expected return of the supplier, retailer, and bank are examined. Our numerical study shows that by sharing revenue and risk among supplier, retailer, and bank, the joint financing strategy can improve...
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