A Simulation Study of Flexible Manufacturing System Using Dynamic Scheduling Approach

2014 ◽  
Author(s):  
Vijay Kumar Mahalingam
Keyword(s):  
Simulation Study ◽  
Flexible Manufacturing ◽  
Manufacturing System ◽  
Flexible Manufacturing System ◽  
Dynamic Scheduling ◽  
Control Strategies ◽  
Dispatching Rules ◽  
Average Delay ◽  
Alternative Routings ◽  
Machine Utilization

This paper presents a simulation study aimed at evaluating the performances of a typical Flexible manufacturing system (FMS) problems in terms of make span, average flow time, average delay time at local buffers and average machine utilization, subject to different control strategies which include routing flexibilities and dispatching rules. The routing strategies under evaluation are ‘No Alternative Routings (NAR)’; ‘Alternative Routings Dynamic (ARD)’; and ‘Alternative Routings Planned (ARP)’. The ARP rule was introduced into the FMS and coded with C++ program. The above routing strategies are combined with five dispatching rules and studied in different production volumes. Since an FMS usually deals with a variety of products, effects of changing the part mix ratio are also discussed. Simulation study was performed by using ARENA software. Finally results indicate that the ‘alternative routings planned’ strategy outperforms other routing strategies in general.

Evaluation of combined dispatching and routeing strategies for a flexible manufacturing system

2002 ◽  
Vol 216 (7) ◽  
pp. 1033-1046 ◽  
Author(s):  
F T S Chan
Keyword(s):  
Performance Measures ◽  
Flexible Manufacturing ◽  
Manufacturing System ◽  
Flexible Manufacturing System ◽  
Buffer Capacity ◽  
Finite Buffer ◽  
Average Delay ◽  
Dynamic Policy ◽  
Machine Utilization ◽  
Local Input

This paper is concerned with the evaluation of combined dispatching and routeing strategies on the performance of a flexible manufacturing system. Three routeing policies: no alternative routeings, alternative routeings dynamic and alternative routeings planned are considered with four dispatching rules with finite buffer capacity. In addition, the effect of changing part mix ratios is also discussed. The performance measures considered are makespan, average machine utilization, average flow time and average delay at local input buffers. Simulation results indicate that the alternative routeings dynamic policy gives the best results in three performance measures except for average delay at local input buffers. Further, the effect of changing part mix ratios is not significant.

scholarly journals Modelling and Analysing Deadlock in Flexible Manufacturing System using Timed Petri Net

2017 ◽  
Vol 2 (1) ◽  
pp. 11-15
Author(s):  
Assem Hatem Taha ◽  
Muataz Hazza Faizi Al Hazza ◽  
Erry Y. T. Adesta
Keyword(s):  
Petri Net ◽  
Flexible Manufacturing ◽  
Manufacturing System ◽  
Flexible Manufacturing System ◽  
The Other ◽  
Shared Resources ◽  
Parallel Lines ◽  
High Utilization ◽  
Machine Utilization ◽  
Conventional Systems

Flexible manufacturing system (FMS) has several advantages compared to conventional systems such as higher machine utilization, higher efficiency, less inventory, and less production time. On the other hand, FMS is expensive and complicated. One of the main problems that may happen is the deadlock. Deadlock is a case that happens when one operation or more are unable to complete their tasks because of waiting of resources that are used by other processes. This may occur due to inappropriate sharing of the resources or improper resource allocation logic which may lead to deadlock occurrence due to the complexity of assigning shared resources to different tasks in an efficient way. One of the most effective tools to model and detect the deadlocks is the petri net. In this research the Matlab software has been used to detect the deadlock in two parallel lines with one shared machines. The analysis shows that deadlock exists at transition with high utilization and place with high waiting time

FORFMS: A FORTRAN Simulation and Analysis Model for Flexible Manufacturing Systems

1993 ◽  
Author(s):  
Chienann Hou ◽  
Milton Bennett
Keyword(s):  
Flexible Manufacturing ◽  
Manufacturing Systems ◽  
Manufacturing System ◽  
Flexible Manufacturing System ◽  
Control Strategies ◽  
General Purpose ◽  
Time Interval ◽  
Analysis Model ◽  
Transfer Lines ◽  
High Production

Abstract The flexible manufacturing system (FMS) is designed to fill the gap between high-production transfer lines and low-production NC machines by optimized utilization of tools and machines. This paper describes a general purpose simulation and analysis model, FORFMS, for the study of flexible manufacturing system. The model is PC based and programmed in FORTRAN with fixed-increment time interval mechanism. A case study of a FMS with six workstations was conducted to evaluate the system performance and to examine control strategies.

Sign in / Sign up

Export Citation Format

Share Document