US 11,703,837 B2
System and method for recommending maximum quantity of work in process, and computer readable medium
Guoliang Shen, Beijing (CN); Dong Chai, Beijing (CN); Haohan Wu, Beijing (CN); Tian Lan, Beijing (CN); and Weihe Liu, Beijing (CN)
Assigned to BOE TECHNOLOGY GROUP CO., LTD., Beijing (CN)
Appl. No. 17/273,177
Filed by BOE Technology Group Co., Ltd., Beijing (CN)
PCT Filed Nov. 29, 2019, PCT No. PCT/CN2019/121940
§ 371(c)(1), (2) Date Mar. 3, 2021,
PCT Pub. No. WO2021/102902, PCT Pub. Date Jun. 3, 2021.
Prior Publication US 2022/0113710 A1, Apr. 14, 2022
Int. Cl. G05B 19/418 (2006.01)
CPC G05B 19/41865 (2013.01) [G05B 19/4183 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A system for determining a maximum quantity of work in process, comprising:
a distributed storage device, an analysis device and a display device, wherein,
the distributed storage device is configured to store production data generated by a factory device;
the analysis device comprises one or more processors configured to perform following operations of determining the maximum quantity of work in process:
acquiring at least part of the production data stored in the distributed storage device, the production data comprises quantity records and cycle time records of a production line in a plurality of time periods, the quantity record of each time period comprises a quantity of work in process at each process station of the production line in said each time period, and the cycle time record of each time period comprises a cycle time at each process station of the production line in said each time period;
clustering the quantity records to obtain a plurality of initial classifications, and each of the initial classifications includes at least one of the quantity records;
determining a portion of the initial classifications as preferred classifications according to cycle time records corresponding to the quantity records of each initial classification; and
determining the maximum quantity of work in process at each process station according to at least a portion of the quantity records of the preferred classification, the maximum quantity of work in process at each process station being the maximum quantity of work in process allowed by each process station; and
the display device is configured to display to a user the maximum quantity of work in process at each process station determined by the analysis device, wherein the user monitors and controls the quantity of work in process at each process station to be no more than the maximum quantity of work in process allowed by each process station,
wherein the determining the maximum quantity of work in process at each process station according to at least the portion of the quantity records of the preferred classification comprises:
determining the portion of the quantity records as the preferred quantity records according to a distance between each of the quantity records of the preferred classification and a cluster center of the preferred classification;
determining a proportion coefficient of each process station according to a ratio of the quantity of work in process at each process station of each preferred quantity record to a total number of products in the production line; and
determining the maximum quantity of work in process at each process station according to the total number of products present in the production line and the proportion coefficient of each process station.