The second error the algorithmic one occurs as a direct result of applying a heuristic for solving the PMP. In this paper we show that for instances that make sense in practice, the modeling error induced by the PMP is negligible. We exclude the algorithmic error completely by solving the adjusted pseudo-Boolean formulation of the PMP exactly, which takes less than one second on a general-purpose PC and software.
- Associated Data!
- Reduced rank proportional hazards model for competing risks (2005)(en)(14s).
- Cold Leg (Dan Ballantine, No. 4) (Dan Ballantine Mysteries).
- Cell Formation in Industrial Engineering?
- An Improved PBIL Algorithm for the Machine-Part Cell Formation!
- Reckoning to Revival: How American Workers Rebuilt an Industry.
- Microfluidics and Nanofluidics Handbook, 2 Volume Set;
Our experimental study shows that the PMP-based model produces high-quality cells and in most cases outperforms several contemporary approaches. In this chapter, we introduce a new heuristic for Cell Formation Problem in its most general formulation with grouping efficiency as an objective function. Suggested approach applies an improvement procedure to obtain solutions with high grouping efficiency. This procedure is repeated until efficiency can be increased for randomly generated configurations of cells. We consider our preliminary results for 10 popular benchmark instances taken from the literature.
Despite the long history of the cell formation problem CF and availability of dozens of approaches, very few of them explicitly optimize the objective of cell formation. These scarce approaches usually lead to intractable formulations that can be solved only heuristically for practical instances. In contrast, we show that CF can be explicitly modelled via the minimum multicut problem and solved to optimality in practice for moderately sized instances. We consider several real-world constraints that can be included into the proposed formulations and provide experimental results with real manufacturing data.
In this paper we describe the cluster modification for the method of conjugated interactions for resource allocation in real time. In contrast to the original method, this modification allows to guarantee an arbitrarily high stability of the structure of resource allocation regardless of the volatile context of solving the problem. This article examines the evolution of the significance of cluster territories in resource - driven economies. Authors provides an analysis of factors in turning a territory into a habitat for an industrial cluster.
Authors have conducted the testing of particular cluster territories for the intensity of using a cluster territory. A model for organizing cargo transportation between two node stations connected by a railway line which contains a certain number of intermediate stations is considered. The movement of cargo is in one direction. Such a situation may occur, for example, if one of the node stations is located in a region which produce raw material for manufacturing industry located in another region, and there is another node station.
The process of cargo transportation is followed by the set rule of control.http://beantrampoline.com/985.php
Designing Stochastic Cell Formation Problem Using Queuing Theory
For such a model, one must determine possible modes of cargo transportation and describe their properties. The class of the solution satisfying nonlocal linear restrictions is extremely narrow. It was possible numerically using the Runge—Kutta method of the fourth order to build these quasi-solutions and determine their rate of growth. Let us note that in the technical plan the main complexity consisted in obtaining quasi-solutions satisfying the nonlocal linear restrictions.
Furthermore, we investigated the dependence of quasi-solutions and, in particular, sizes of gaps jumps of solutions on a number of parameters of the model characterizing a rule of control, technologies for transportation of cargo and intensity of giving of cargo on a node station. Event logs collected by modern information and technical systems usually contain enough data for automated process models discovery.
A variety of algorithms was developed for process models discovery, conformance checking, log to model alignment, comparison of process models, etc. This paper describes an ROLAP-based method of multidimensional event logs storage for process mining. The result of the analysis of the journal is visualized as directed graph representing the union of all possible event sequences, ranked by their occurrence probability. Our implementation allows the analyst to discover process models for sublogs defined by ad-hoc selection of criteria and value of occurrence probability.
The GIS features vector data shapefiles of allprovinces of the two states. For the census, there is information about linguistic, religious, and social estate groups. The part based on the census features nationality. Both shapefiles include information on gender, rural and urban population. The GIS allows for producing any necessary maps for individual studies of the period which require the administrative boundaries and demographic information.
Existing approaches suggest that IT strategy should be a reflection of business strategy. However, actually organisations do not often follow business strategy even if it is formally declared.
For solving exactly, the proposed model is linearized. Since the cell formation problem is NP-Hard, two algorithms based on genetic and modified particle swarm optimization MPSO algorithms are developed to solve the problem. For generating of initial solutions in these algorithms, a new heuristic method is developed, which always creates feasible solutions. Also, full factorial and Taguchi methods are used to set the crucial parameters in the solutions procedures.
Numerical experiments are used to evaluate the performance of the proposed algorithms. The results of the study show that the proposed algorithms are capable of generating better quality solutions in much less time. Finally, a statistical method is used which confirmed that the MPSO algorithm generates higher quality solutions in comparison with the genetic algorithm GA. Keywords Cell formation ; Queuing theory ; particle swarm optimization ; Branch and Bound Statistics. Journal Management System.
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- Cell Formation in Industrial Engineering: Theory, Algorithms and Experiments | eBay.
- What is Kobo Super Points?.
- Journal of Industrial Engineering and Management.
- Money Boy.
- Production Ecology of British Moors and Montane Grasslands;
This paper presents a new nonlinear mathematical model to solve a cell formation problem which assumes that processing time and inter-arrival time of parts are random variables. This paper develops three linear programming models to study the sustainability of an HIE network. This study helps decision makers understand the sustainability of HIE networks in a dynamic environment.
Keywords : Healthcare information exchange; linear programming; optimization. In this paper, we discuss the requirements and practical aspects of building such a system and demonstrate its use and functioning with different types of statistical modelling methods applied for quality monitoring in industrial applications.
The two case studies presenting the development work were selected from the steel industry. One case study predicting the profile of a stainless steel strip tested the usability of the tool offline, while the other study predicting the risk of roughness of a steel strip had an online test period.
SIAM Journal on Computing
User experiences from a test use period were collected with a system usability scale questionnaire. Keywords : data mining; generalized boosted regression; GBM; quality improvement; online monitoring; knowledge representation; product design. These multiple characteristics or responses are often interacting or correlated. In such a situation, changing the process operating conditions for improving or controlling the quality of one response may deteriorate the quality of another.
Pareto-optimal front of cell formation problem in group technology - Semantic Scholar
Thus, there is a need to simultaneously consider all responses and recommend a trade-off operating condition for process control and optimisation. Two important fields that consider simultaneous control and optimisation of multiple responses are the multi-variate statistical process control MSPC and multiple response optimisation MRO. In the context of MSPC, there are three distinct phases of process control, namely, i correct identification of an out-of-control signal, ii identification of influential response variable s that contribute to an out-of-control signal, and finally iii re-establishment of the stability of the process by implementing necessary adjustments in the process setting conditions.
Although various parametric and non-parametric MSPC and MRO solution approaches have been previously proposed, there is limited prior research work on the integration of the MSPC and MRO solution approaches to ensure the stability and process capability of the abrasive machining processes.
In this study, a synergic MSPC and MRO approach is proposed, based on the Mahalanobis distance MD , MahalanobisTaguchi system, r-control chart, seemingly unrelated regression SUR and non-linear optimisation technique, to ensure the stability and capability of the abrasive machining process.
The suitability of the proposed approach is verified using a real life abrasive machining case data set. The traditional methodology of software engineering succumbs towards the changing need of customer and technology advancement.
Agile methodology targets complex systems with its iterative, incremental and evolutionary approach. There are numerous factors attributing towards the successful implementation of agile methodology. The measurement and evaluation of these agile success factors in an enterprise remains a challenge. This research paper presents a framework to analyse and measure the success factors of agile methodology in an enterprise, using Two-way assessment and Analytic hierarchy process AHP.
A case study has been conducted in a large enterprise in banking sector and twelve success factors of agile implementation have been evaluated and measured. Keywords : Software Quality; Agile methodology; Two-way assessment; Analytic hierarchy process; Continuous integration; Enterprise application.
The customers arrive according to a Poisson process. The individual customer's unit demand is satisfied after an exponential service time. After a customer is served, she will decide either to join the retrial group, which is of infinite orbit, for another service or leaves the system according to a Bernoulli trial. These orbiting customers compete for service according to constant retrial policy. The service time for these feedback customers are assumed to be exponential. The inventory is replenished according to an s,S policy and the lead times are exponential.
We have carried out the busy period, waiting time and steady state analysis of the system. Some important system performance measures in the steady state are derived and the long-run total expected cost rate is also calculated. The results are illustrated numerically. It is based on a global established supply chain for which the central problem is to determine the closure and consolidation of national distribution centers.