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  • Articles  (3)
  • heuristic
  • Springer  (3)
  • American Geophysical Union (AGU)
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  • 2000-2004  (1)
  • 1980-1984  (2)
  • Economics  (3)
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Annals of operations research 1 (1984), S. 273-289 
    ISSN: 1572-9338
    Keywords: Average complexity ; satisfiability ; pure literal ; heuristic ; Davis-Putnam procedure
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics , Economics
    Notes: Abstract An algorithm for the SATISFIABILITY problem is presented and a probabilistic analysis is performed. The analysis is based on an instance distribution which is parametrized to simulate a variety of sample characteristics. The algorithm either correctly determines whether a given instance of SATISFIABILITY has a solution or gives up. It is shown that the algorithm runs in polynomial time and gives up with probability approaching zero as input size approaches infinity for a range of parameter values. This result is an improvement over the results in [3] and [4].
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Annals of operations research 1 (1984), S. 23-42 
    ISSN: 1572-9338
    Keywords: Hierarchical planning problem ; stochastic programming ; heuristic ; performance measure ; probabilistic analysis ; asymptotic optimality ; machine scheduling
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics , Economics
    Notes: Abstract As we have argued in previous papers, multi-level decision problems can often be modeled as multi-stage stochastic programs, and hierarchical planning systems designed for their solution, when viewed as stochastic programming heuristics, can be subjected to analytical performance evaluation. The present paper gives a general formulation of such stochastic programs and provides a framework for the design and analysis of heuristics for their solution. The various ways to measure the performance of such heuristics are reviewed, and some relations between these measures are derived. Our concepts are illustrated on a simple two-level planning problem of a general nature and on a more complicated two-level scheduling problem.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Annals of operations research 96 (2000), S. 317-337 
    ISSN: 1572-9338
    Keywords: lot size model ; business volume discount ; heuristic ; dynamic programming
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics , Economics
    Notes: Abstract This paper considers the multi-item dynamic lot size model where joint business volume discount is applied for all items purchased whenever the total dollar value of an order reaches a certain level. Multi-item discounts are prevalent in practical applications, yet the literature has only considered limited instances of single-item models. We establish the mathematical formulation and design an effective dynamic programming based heuristic. Computational results disclose our approach obtains high quality solutions that dominate the best known heuristic for the simplified one-item case, and that proves vastly superior to the state-of-the-art CPLEX MIP code for the multi-item case (for which no alternative heuristics have been devised). We obtained significantly better solutions than CPLEX for the more complex problems, while running from 4800 to over 100,000 times faster. Enhanced variants of our method improve these outcomes further.
    Type of Medium: Electronic Resource
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