This paper addresses a ternary-integration scheduling problem that incorporates employee timetabling into the scheduling of machines and transporters in a job-shop environment with a finite number of heterogeneous transporters where the objective is to minimize the completion time of all jobs. The problem is first formulated as a mixed-integer linear programming model. Then, an Anarchic Society...

Abstract In this paper we present an evolutionary heuristic for the offline two-dimensional variable-sized bin packing problem. problem have to pack a set of rectangles into rectangular bins. The bins are divided types, and in different types sizes possibly weights (costs). There (sufficiently) many from each type, any rectangle fits at least one bin-type. goal is without overlap, parallel side...

in today's globalization, an effective integration of production and distribution plans into a unified framework is crucial for attaining competitive advantage. this paper addresses an integrated multi-product and multi-time period production/distribution planning problem for a two-echelon supply chain subject to the real-world variables and constraints. it is assumed that all transportations a...

Cellular manufacturing (CM) is one of the most important subfields in the design of manufacturing systems and as a recently emerged field of study and practice, virtual cellular manufacturing (VCM) inherits the importance from CM. One type of VCM problems is VCM with alternative processing routes from which the route for processing each part should be selected. In this research, a bi-objective ...

Many different encodings for pseudo-Boolean constraints to the Boolean satisfiability problem have been proposed in the past. In this work we present a novel small sized and simple to implement encoding. The encoding maintains generalized arc consistency by unit propagation and results in a linear sized formula in conjunctive normal form with respect to the number of input variables. Experiment...

This paper explores, via literature review and focus group discussions, the relative importance that Master Data Management (MDM) plays in the implementation and maintenance of ERP systems. The focus group included key players of large-scale ERP implementations and/or upgrades, from both an internal intra-company and consulting standpoint. The findings of the discussions resulted in practical a...

The construction industry plays a significant role in the economy of developing countries. The sector is, however, also one of the most hazardous with frequent accidents and health related problems. The purpose of this study is to examine the health and safety practices of construction small and medium-sized businesses (SMEs) in Ghana with a view to improving the health and safety performance o...

W e present a deterministic polynomial-time algorithm for the ABC problem, which is the membership problem for 2-generated commutative linear semigroups over an algebraic number field. W e also obtain a polynomial t ime algorithm for the (easier) membership problem for 2-generated abelian linear groups. Furthermore, we provide a polynomial-sized encoding for the set of all solutions.