Yield comparison of push and pull control methods on production systems with unreliable machines

1997 ◽  
Vol 50 (1) ◽  
pp. 1-12 ◽  
Author(s):  
Jihong Ou ◽  
Jiong Jiang
Keyword(s):  
Production Systems ◽  
Control Methods ◽  
Unreliable Machines ◽  
Pull Control ◽  
Push And Pull

scholarly journals Improvability of assembly systems I: Problem formulation and performance evaluation

2000 ◽  
Vol 6 (4) ◽  
pp. 321-357 ◽  
Author(s):  
S.-Y. Chiang ◽  
C.-T. Kuo ◽  
J.-T. Lim ◽  
S. M. Meerkov
Keyword(s):  
System Performance ◽  
Production Systems ◽  
Problem Formulation ◽  
Assembly Systems ◽  
Unreliable Machines ◽  
Automotive Components ◽  
Analysis Technique ◽  
Distribution Of Resources ◽  
And Performance

This work develops improvability theory for assembly systems. It consists of two parts. Part I includes the problem formulation and the analysis technique. Part II presents the so-called improvability indicators and a case study.Improvability theory addresses the questions of improving performance in production systems with unreliable machines. We consider both constrained and unconstrained improvability. In the constrained case, the problem consists of determining if there exists a re-distribution of resources (inventory and workforce), which leads to an increase in the system's production rate. In the unconstrained case, the problem consists of identifying a machine and a buffer, which impede the system performance in the strongest manner.The investigation of the improvability properties requires an expression for the system performance measures as functions of the machine and buffer parameters. This paper presents a method for evaluating these functions and illustrates their practical utility using a case study at an automotive components plant. Part II uses the method developed here to establish conditions of improvability and to describe additional results of the case study.

Modelling and Design of Closed-Loop Manufacturing Systems

2013 ◽  
Vol 378 ◽  
pp. 367-374 ◽  
Author(s):  
Andrey A. Kutin ◽  
Mikhail Turkin
Keyword(s):  
Analytical Method ◽  
Flexible Manufacturing ◽  
Manufacturing Systems ◽  
Manufacturing System ◽  
Flexible Manufacturing System ◽  
Closed Loop ◽  
Production Systems ◽  
Finite Buffers ◽  
Unreliable Machines

This paper introduces an analytical method for evaluating the performance of closed loop manufacturing systems with unreliable machines and finite buffers. The method involves transforming an arbitrary loop into one without thresholds and then evaluating the transformed loop using a new set of decomposition equations. It is more accurate than existing methods and is effective for a wider range of cases. The convergence reliability, and speed of the method are also discussed. In addition, observations are made on the behavior of closed loop production systems under various conditions. Finally, the method is used in a case study to design a flexible manufacturing system for production of aerospace parts.

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