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  • 1
    Electronic Resource
    Electronic Resource
    On using continuous flow lines to model discrete production lines (1994)
    Springer
    Discrete event dynamic systems 4 (1994), S. 129-169 
    Details
    ISSN: 1573-7594
    Keywords: Transfer lines ; tandem queues ; performance analysis ; simulation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Notes: Abstract We extend previous research on the use of models ofcontinuous tandem (CT) lines for performance analysis ofdiscrete tandem (DT) production lines. We formalize the translation of input parameters from the DT line to the CT model, as well as the translation of performance measures (PMs) obtained from the CT model back to the DT line. We show that although the CT model conceptually represents a line with continuous fluid, it can be represented as a generalized semi-Markov process (GSMP). This representation leads to a simple and concise simulation algorithm for a CT model. We investigate the accuracy of the CT model for prediction of PMs in the DT line, and show that, with proper translation of parameters and PMs, the CT model provides reasonable estimates for the DT line PMs. We provide preliminary results on gradient estimation for CT models via infinitestimal perturbation analysis. The aim of the paper is to provide a firm foundation for the future exploration of CT models as a means to parameter optimization for DT lines.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01441209
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Design for analysis: A new strategy to improve the design process (1989)
    Springer
    Research in engineering design 1 (1989), S. 105-120 
    Details
    ISSN: 1435-6066
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Technology
    Notes: Abstract The concept ofdesign for analysis (DA) as a strategy for designing a product or system is studied. DA states that designers should be constrained to work with only those designs which can be analyzed easily and quickly by simple tools. DA imposes some discipline and constraints on the designers. Nevertheless, it is conjectured that this will lead to shorter design times as well as designs that are superior in a number of senses. This paper presents our initial investigation of DA, which aims to determine whether it has potential as a design strategy. First, we refine the definition of DA and pose some hypotheses regarding its impact on the design process. Then we describe five case studies on actual design processes which show that DA could significantly improve the design process. Finally, design steps based on DA are presented. While these results are still preliminary, we propose that DA as a design strategy has the potential of being an important strategic weapon for gaining competitive advantage.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01580204
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Analytical performance models for closed-loop flexible assembly systems (1988)
    Springer
    International journal of flexible manufacturing systems 1 (1988), S. 51-84 
    Details
    ISSN: 1572-9370
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Flexible Assembly Systems (FASs), which form an important subset of modern manufacturing systems, are finding increasing use in today's industry. In the planning and design phase of these systems, it is useful to have tools that predict system performance for various operating conditions. In this article, we present such a performance analysis tool based on queueing approximation for a class of FASs, namely, closed-loop flexible assembly systems (CL-FASs). For CL-FASs, we describe iterative algorithms for computing steady-state performance measures, including production rate and station utilizations. These algorithms are computationally simple and have a fast convergence rate. We derive a new approximation to correct the mean delay at each queue. This improves the accuracy of performance prediction, especially in the case of small CL-FASs. Comparisons with simulation results indicate that the approximation technique is reasonably accurate for a broad range of parameter values and system sizes. This makes possible efficient (fast and computationally inexpensive) analysis of CL-FASs under various conditions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00713159
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  • 4
    Electronic Resource
    Electronic Resource
    Performance Analysis of Flexible Manufacturing Systems with a Single Discrete Material-Handling Device (1997)
    Springer
    International journal of flexible manufacturing systems 9 (1997), S. 223-249 
    Details
    ISSN: 1572-9370
    Keywords: flexible manufacturing systems ; performance evaluation ; material handling ; queueing network models
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract We present an analytical model for performance prediction of flexible manufacturing systems (FMSs) with a single discrete material-handling device (MHD). This configuration of FMS is significant for many reasons: it is commonly found in industry, it simplifies material-handling control, it is amenable to analytical modeling, and it forms a building block for more complex systems. Standard queueing models are inadequate to analyze this configuration because of the need to take into consideration many nontrivial issues such as state-dependent routing, interference from the MHD, and the analysis of the MHD. To account for state-dependent routing, we develop an iterative method that is built around mean value analysis. To analyze the MHD interference, we use two queueing network models. In the first, we ignore queueing at the MHD but model the interference from the MHD by inflating the station service times. The second network models the queueing for the MHD and estimates the blocking (inflation) times needed for the first model. By iterating between the two networks, we are able to predict the performance of this configuration of FMS. Our analytical estimates are validated against discrete event simulation and shown to be quite accurate for initial system design.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1007901028906
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    Perturbation analysis of theGI/GI/1 queue (1994)
    Springer
    Queueing systems 18 (1994), S. 199-248 
    Details
    ISSN: 1572-9443
    Keywords: Sensitivity analysis ; second derivatives estimation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science
    Notes: Abstract We examine a family ofGI/GI/1 queueing processes generated by a parametric family of service time distributions,F(x,θ), and we show that under suitable conditions the corresponding customer stationary expectation of the system time is twice continuously differentiable with respect toθ. Expressions for the derivatives are given which are suitable for single run derivative estimation. These results are extended to parameters of the interarrival time distribution and expressions for the corresponding second derivatives (as well as partial second derivatives involving both interarrivai and service time parameters) are also obtained. Finally, we present perturbation analysis algorithms based on these expressions along with simulation results demonstrating their performance.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01158763
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    Paper (German National Licenses)
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  • 6
    Electronic Resource
    Electronic Resource
    Sample Path Analysis for Continuous Tandem Production Lines (1999)
    Springer
    Discrete event dynamic systems 9 (1999), S. 211-239 
    Details
    ISSN: 1573-7594
    Keywords: sample path analysis ; stochastic convexity ; infinitesimal perturbation analysis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Notes: Abstract We consider a tandem production line where the product flowing through the line is continuous fluid. We call such a line a continuous tandem (CT) line. We derive a recursive representation for the departure time of products in CT lines. Next, we apply sample path analysis techniques to prove that the departure time is convex (in the sense of strong stochastic convexity) in the flow rates of the machines. We then prove that the infinitesimal perturbation analysis (IPA) estimate, for the gradient of throughput with respect to machine flow rates, is strongly consistent.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1008345330312
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    Paper (German National Licenses)
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  • 7
    Electronic Resource
    Electronic Resource
    Optimal multiprogramming (1976)
    Springer
    Acta informatica 7 (1976), S. 197-216 
    Details
    ISSN: 1432-0525
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science
    Notes: Summary Three heuristics for controlling the multiprogramming load to maximize system work capacity are studied. Each allows the highest load possible subject to a given constraint. The knee criterion constrains the memory policy so that program resident sets average near the knees of their inter page fault lifetime curves. The L=S criterion constrains the memory policy or load so that the system inter page fault lifetime L is at least as large as page swap time S. The 50 % criterion constrains the load so that the paging device is busy approximately half the time. Numerical evaluations of queueing networks show that the knee criterion, which is the most difficult to implement, is the most robust, while the easily implemented 50 % criterion is the least robust. These evaluations also circumscribe the conditions under which the criteria are expected to work reliably. Examples from practical systems further validate the criteria. Stability problems are examined.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00265771
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    Paper (German National Licenses)
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  • 8
    Book
    Book
    3rd ORSA/TIMS conference on flexible manufacturing systems: operations research models and applications. Proceedings; Vol. 8 (1989)
    Amsterdam u.a. :Elsevier,
    Details
    Title: 3rd ORSA/TIMS conference on flexible manufacturing systems: operations research models and applications. Proceedings; Vol. 8
    Contributer: Stecke, Kathryn E. , Suri, Rajan
    Publisher: Amsterdam u.a. :Elsevier,
    Year of publication: 1989
    Pages: 388 S.
    Series Statement: Manufacturing research and technology Vol. 8
    Type of Medium: Book
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    Zuse Institute Berlin get availability status
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