1.1 The background on the ELSP The Economic Lot Scheduling Problem (ELSP) is concerned with scheduling the cyclical production of n≥2 products on a single facility in lots that differ in size and, consequently, differ in production times and cycles. The cost items involved are: setup cost and inventory holding cost. A popular category of research for the ELSP is so-called “basic period-based cy...

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Article history: Received 1 August 2011 Accepted 28 October 2011 Available online 29 October 2011 Recently, the economic lot scheduling problem (ELSP) with common cycle time and shelf life restrictions has attracted the attention of several researchers. In this paper, a comparative study of solutions given by Xu and Sarker (2003) [Computers & Operations Research 30 (6), 925938] with the results...

We consider the production of multiple standardized products on a single machine with limited capacity and set-up times under random demands and random production times, i.e., the so-called stochastic economic lot scheduling problem (SELSP). The main task for the production manager in this setting is the construction of a production plan for the machine that minimizes the total costs, i.e., the...

Richard H. Wilson Veterans Administration Medical Center Mountain Home, TN Audibility thresholds for a 1000-Hz sinusoid were measured with a standard clinical (CLIN) procedure and a two-interval, forced-choice (21FC) adaptive procedure bracketing 79% correct. Both used 2and 5-dB step sizes in quiet and in a continuous, broadband noise background. Clinical thresholds were from 2 to 4 dB higher t...

The advantages of satellites in multicast and broadcast service provision has attracted a lot of interest within the satellite community and motivated a re-examination of the role of mobile satellite systems with regard to terrestrial networks. This paper reports on the approach taken by the IST project SATIN towards the definition of a suitable architecture for the delivery of multicast/broadc...

We consider the problem of approximating the branch and size dependent demand of a fashion discounter with many branches by a distributing process being based on the branch delivery restricted to integral multiples of lots from a small set of available lot-types. We propose a formalized model which arises from a practical cooperation with an industry partner. Besides an integer linear programmi...

In this paper, a problem of scheduling tasks in uniform parallel machines with sequence-dependent setup times is presented. The problem under analysis contains a particular set of constraints, including equipment capacity, task precedences, lot sizing and task delivery plan. The complexity of the mathematical programming model developed for this problem hasn’t permitted to find one solution usi...

Abstract Based on the landing environment of airport aircraft and cleaning requirements a large number navigation aids, this paper proposes scheme intelligent aids with mobile robots delivery vehicle. The efficiency robot can be effectively improved by optimizing mode moving path using feature point according to layout aids. Full automation light has been achieved, which saves lot manpower reso...