The goal of this paper is to investigate scheduling heuristics to seek the minimum of a positively weighted convex sum of makespan and the number of tardy jobs in a static hybrid flow shop environment where at least one production stage is made up of unrelated parallel machines. In addition, sequence and machine dependent setup times are considered. The problem is a combinatorial optimization p...

Gündüz Ulusoy Faculty of Engineering and Natural Sciences, Sabancı University, Istanbul, Turkey. [email protected] ABSTRACT This paper considers multiprocessor task scheduling in a multistage hybrid flow-shop environment. The objective is to minimize the make-span, i.e. the completion time of all the tasks in the last stage. This problem is of practical interest in the textile and process ...

The work described in this paper attempts to validate the implicit assumption in traditional flow shop scheduling research that there is a buffer of infinite capacity between any two adjacent machines. The modified NEH (Nawaz, Encore and Ham) algorithm is used to generate an initial permutation schedule which is then improved by tabu search. For any given sequence, a limited equal buffer size i...

Researchers and scientists have been using crowdsourcing platforms to collect labeled training data in recent years. The process is cost-effective and scalable, but research has shown that the quality of truth inference is unstable due to worker bias, work variance, and task difficulty. In this demonstration, we present a hybrid system, named IDLE (Integrated Data Labeling Engine), that brings ...

In manufacturing shops in practice, machine capacity is often constrained by more than one type of resource. Yet research mainly focusses on the effects only resource that constrains capacity, e.g. labour, tooling or auxiliary constraints. response, we use simulation to assess impact order release, dispatching and assignment rules make-to-order job with multiple The wasted while a stands idle w...

short term prediction of traffic flow is one of the most essential elements of all proactive traffic control systems. although various methodologies have been applied to forecast traffic parameters, several researchers have showed that compared with the individual methods, hybrid methods provide more accurate results . these results made the hybrid tools and approaches a more common method for ...

ABSTRACT IEEE 802.16 WiMAX is a promising technology to provide broadband wireless networking access. IEEE 802.16j Mobile Multihop Relay standard introduces multihop relaying to WiMAX system. Relay stations are used to extended network coverage and enhance system throughput. To reduce power consumption, an idle mode MS does not send location update messages while moving across cell borders. Pag...

In this talk a self-adaptive, swarm-based control model for real-time part routing in a flexible flow shop environment is presented.. The proposed control model is a multi-agent system that exhibits adaptive behaviour, which has been inspired from the natural system of the wasp colony. The production problem, which was first introduced by Morley et al. (Morley and Schelberg 1993, Morley 1996, M...

The max / / C idle no F − problem is solved by a branch and bound algorithm, or a mixed integer programming solver. This problem is known to be NP-hard. The noidle flow-shop configuration, where machines work continuously without idle intervals is an interesting manufacturing environment in many industries. The idle characteristic is a very strong constraint and it affects seriously the value o...