Browsing by Keywords "Controllable processing times"
Now showing items 120 of 20

An analysis of cyclic scheduling problems in robot centered cells
(2012)The focus of this study is a robot centered cell consisting of m computer numerical control (CNC) machines producing identical parts. Two pure cycles are singled out and further investigated as prominent cycles in minimizing ... 
An anticipative scheduling approach with controllable processing times
(Elsevier, 2010)In practice, machine schedules are usually subject to disruptions which have to be repaired by reactive scheduling decisions. The most popular predictive approach in project management and machine scheduling literature is ... 
Bicriteria robotic cell scheduling
(Springer, 2008)This paper considers the scheduling problems arising in two and threemachine manufacturing cells configured in a flowshop which repeatedly produces one type of product and where transportation of the parts between the ... 
Bicriteria robotic cell scheduling with controllable processing times
(Taylor & Francis, 2011)The current study deals with a bicriteria scheduling problem arising in an mmachine robotic cell consisting of CNC machines producing identical parts. Such machines by nature possess the process flexibility of altering ... 
Considering manufacturing cost and scheduling performance on a CNC turning machine
(Elsevier, 2007)A well known industry application that allows controllable processing times is the manufacturing operations on CNC machines. For each turning operation as an example, there is a nonlinear relationship between the manufacturing ... 
Constrained optimal hybrid control of a flow shop system
(Institute of Electrical and Electronics Engineers, 2007)We consider an optimal control problem for the hybrid model of a deterministic flow shop system, in which the jobs are processed in the order they arrive at the system. The problem is decomposed into a higherlevel ... 
Lot sizing with nonlinear production cost functions
(Bilkent University, 201507)In this study, we consider di erent variations of the lot sizing problem encountered in many real life production, procurement and transportation systems. First, we consider the deterministic lot sizing problem with ... 
Master production scheduling under uncertainty with controllable processing times
(Bilkent University, 2009)Master Production Schedules (MPS) are widely used in industry especially within Enterprise Resource Planning (ERP) Software. MPS assumes infinite capacity, fixed processing times and a single scenario for demand forecasts. ... 
A multistage stochastic programming approach in master production scheduling
(Elsevier, 2011)Master Production Schedules (MPS) are widely used in industry, especially within Enterprise Resource Planning (ERP) software. The classical approach for generating MPS assumes infinite capacity, fixed processing times, and ... 
A new bounding mechanism for the CNC machine scheduling problems with controllable processing times
(Elsevier, 2005)In this study, we determine the upper and lower bounds for the processing time of each job under controllable machining conditions. The proposed bounding scheme is used to find a set of discrete efficient points on the ... 
Parallel machine matchup scheduling with manufacturing cost considerations
(Springer, 2010)Many scheduling problems in practice involve rescheduling of disrupted schedules. In this study, we show that in contrast to fixed processing times, if we have the flexibility to control the processing times of the jobs, ... 
Predictive/reactive scheduling with controllable processing times and earlinesstardiness penalties
(Taylor & Francis, 2009)In this study, a machine scheduling problem with controllable processing times in a parallelmachine environment is considered. The objectives are the minimization of manufacturing cost, which is a convex function of ... 
Rescheduling parallel machines with controllable processing times
(Bilkent University, 2012)In many manufacturing environments, the production does not always endure as it is planned. Many times, it is interrupted by a disruption such as machine breakdown, power loss, etc. In our problem, we are given an original ... 
Scheduling in flexible robotic manufacturing cells
(Bilkent University, 2006)The focus of this thesis is the scheduling problems arising in robotic cells which consist of a number of machines and a material handling robot. The machines used in such systems for metal cutting industries are ... 
Scheduling parallel CNC machines with time/cost tradeoff considerations
(Elsevier, 2007)When the processing times of jobs are controllable, selected processing times affect both the manufacturing cost and the scheduling performance. A wellknown example for such a case that this paper specifically deals with ... 
Single CNC machine scheduling with controllable processing times and multiple due dates
(Taylor & Francis, 2008)In this study, we solve the single CNC machine scheduling problem with controllable processing times. Our objective is to maximize the total profit that is composed of the revenue generated by the set of scheduled jobs ... 
Stochastic lot sizing problem with controllable processing times
(Elsevier, 2015)In this study, we consider the stochastic capacitated lot sizing problem with controllable processing times where processing times can be reduced in return for extra compression cost. We assume that the compression cost ... 
Stochastic lot sizing problem with nervousness considerations
(Elsevier, 2018)In this paper, we consider the multistage stochastic lot sizing problem with controllable processing times under nervousness considerations. We assume that the processing times can be reduced in return for extra cost ... 
Time/cost tradeoffs in machine scheduling with controllable processing times
(Bilkent University, 2008)Processing time controllability is a critical aspect in scheduling decisions since most of the scheduling practice in industry allows controlling processing times. A very well known example is the computer numerically ... 
Twomachine flowshop scheduling with flexible operations and controllable processing times
(2013)We consider a twomachine flowshop scheduling problem with identical jobs. Each of these jobs has three operations, where the first operation must be performed on the first machine, the second operation must be performed ...