Showing 1 - 10 of 1,379
-known longest-first heuristics - the LPT- (longest processing time) and the RLPT-heuristic (restricted LPT). We provide insights … into the solution structure of these two sequencing heuristics and prove that the minimum completion time of the LPT …
Persistent link: https://www.econbiz.de/10008695050
. The loading and unloading times are both equal to one time unit. The goal is to minimize the makespan. We propose a O …(n log n) solution algorithm for the preemptive variant of the problem. …
Persistent link: https://www.econbiz.de/10010940521
cost subject to the makespan being at its minimum. Since both problems are strongly NP-hard, we propose fast heuristics and … objectives. The first type is one of two classical objective functions in scheduling theory: either the total completion time or … the makespan. The second type involves an actual cost associated with the processing of a specific job on a given machine …
Persistent link: https://www.econbiz.de/10010871187
The hybrid flowshop scheduling (HFS) problem with the objective of minimising the makespan has important applications … in a variety of industrial systems. This paper presents an effective discrete artificial bee colony (DABC) algorithm that … heuristics. Next, an initial population is generated with a high level of quality and diversity based on the presented heuristics …
Persistent link: https://www.econbiz.de/10010744167
cumulative network accessibility throughout the cleanup operation and minimizes makespan. We propose several practical and robust …
Persistent link: https://www.econbiz.de/10011118026
Motivated by a problem faced by a large manufacturer of a consumer product, we explore the interaction between production planning and capacity acquisition decisions in environments with demand growth. We study a firm producing multiple items in a multiperiod environment where demand for items...
Persistent link: https://www.econbiz.de/10009208838
Cyclical scheduling, where the time between production periods for each item is constant, offers simplicity and ease of control compared with noncyclical scheduling, where production periods are irregularly spaced. However, when demands are dynamic, flexibility in the spacing of production...
Persistent link: https://www.econbiz.de/10009209080
develop a capacitated production planning model for a single product with terminal demand. We develop four heuristics for the … problem and characterize their performance. In particular, two of the heuristics are optimal for the no holding-cost case. In … our computational study, we analyze the performance of our heuristics and compare them to the optimal solution and to a …
Persistent link: https://www.econbiz.de/10009218513
demand, such that future forecasts lie within the current band. We develop heuristics that utilize knowledge of demand … explore the efficiency of our heuristics, and also explore the impact of seasonality on demand and availability of information …
Persistent link: https://www.econbiz.de/10009218731
The planning of purchasing and production lot-size for multi-item multi-period multi-workstation capacitated production (MLCLSP-M) is discussed. Since the model is a NP-hard problem, this research proposes a heuristic method (A-LS), which decomposes the model into two sub-problems and...
Persistent link: https://www.econbiz.de/10009352925