منابع مشابه
Lot sizing and sequencing optimisation at an animal-feed plant
This paper applies a mixed integer programming model for joint lot sizing and scheduling to a plant for animal feed compounds. A key characteristic of this industry is that certain products can perform a production line cleaning function if a sufficiently large lot is produced between two products that would otherwise require a cleaning setup. Thus the sequence-dependent setup times do not alwa...
متن کاملA Local Search Approach to Lot Sequencing and Sizing
This working paper reports ongoing research into the simultaneous sequencing and sizing of production lots on a set of parallel machines in the presence of sequencedependent setup times. A flexible mixed integer programming (MIP) model is presented which is optimally solvable only for very small instances. As an alternative, a local search approach is discussed and outlined, making use at each ...
متن کاملRelax and Fix Heuristics for Simultaneous Lot Sizing and Sequencing the Permutation Flow Shops with Sequence-Dependent Setups
This paper proposes two relax and fix heuristics for the simultaneous lot sizing and sequencing problem in permutation flow shops involving sequence-dependent setups and capacity constraints. To evaluate the effectiveness of mentioned heuristics, two lower bounds are developed and compared against the optimal solution. The results of heuristics are compared with the selected lower bound .
متن کاملThe Impact of Lot Sizing on Queuing Delays an Educational Software Tool
It is now widely accepted that both large and small lot sizes can cause long lead times and consequently bad customer service in terms of late deliveries. The impact of the lot size on the lead time consists of a convex relationship, implying an optimal lot size minimising average lead time. In order to educate people with this undoubtedly correct, but yet controversial issue, we developed an e...
متن کاملMulti-item Capacity Constrained Dynamic Lot-sizing and Sequencing with Setup Time
Production lot-sizing has a special significance in supply chain taking into account the fact that majority of the lot-sizing problems are associated with NP-hard scheduling and sequencing problems. The complexity increases exponentially when multi-item capacitated dynamic lot-sizing is considered. The basic economic production quantity (EPQ) model minimizes the sum of setup and holding cost un...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Management Science
سال: 1987
ISSN: 0025-1909,1526-5501
DOI: 10.1287/mnsc.33.3.419