In this paper, the authors consider a partially flexible manufacturing system that consists of two production subsystems and an inventory subsystem. The model consists of a flexible production facility, denoted as , making two product types, denoted as types 1 and 2, two dedicated production facilities for each product type, referred to as and , respectively, and an inventory subsystem with two dedicated buffers in front of and , represented by and , respectively. The time axis is slotted in cycles. In each cycle, the flexible machine has probability to be up and make a type part, . The dedicated production facility has probability to be up, ready to make a type part, . It is assumed that . The control variable is the threshold for buffer and is denoted as , . The flexible machine continues working on type products until the occupancy in reaches , . Then, the operation of type products is stopped and set up for the other product type to be carried out. Dedicated machine is starved if buffer is empty, . Machine is never starved and is not blocked during setup. The machine status may be up, down or changeover, and it is determined at the beginning of the cycle, whereas the buffer status is determined at the end of the cycle. With this model formulation, the authors study how to develop an optimal control policy to minimize starvation time for and while maintaining the desired throughput, and investigate system properties.
Recensione dell'articolo:(Zhao, Cong; Kang, Ningxuan; Li, Jingshan; Horst, John A. - " Production control to reduce starvation in a partially flexible production-inventory system. " - IEEE Trans. Automat. Control 63 (2018), no. 2, 477–491.) MR3758974 MathSciNet ISSN 2167-5163
Leonardo Pasini
2019-01-01
Abstract
In this paper, the authors consider a partially flexible manufacturing system that consists of two production subsystems and an inventory subsystem. The model consists of a flexible production facility, denoted as , making two product types, denoted as types 1 and 2, two dedicated production facilities for each product type, referred to as and , respectively, and an inventory subsystem with two dedicated buffers in front of and , represented by and , respectively. The time axis is slotted in cycles. In each cycle, the flexible machine has probability to be up and make a type part, . The dedicated production facility has probability to be up, ready to make a type part, . It is assumed that . The control variable is the threshold for buffer and is denoted as , . The flexible machine continues working on type products until the occupancy in reaches , . Then, the operation of type products is stopped and set up for the other product type to be carried out. Dedicated machine is starved if buffer is empty, . Machine is never starved and is not blocked during setup. The machine status may be up, down or changeover, and it is determined at the beginning of the cycle, whereas the buffer status is determined at the end of the cycle. With this model formulation, the authors study how to develop an optimal control policy to minimize starvation time for and while maintaining the desired throughput, and investigate system properties.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
