US 12,405,605 B2
Process capability index warning system and warning method for the same
Chang-Sheng Tsau, Taipei (TW)
Assigned to PEGATRON CORPORATION, Taipei (TW)
Filed by PEGATRON CORPORATION, Taipei (TW)
Filed on Apr. 3, 2023, as Appl. No. 18/129,947.
Claims priority of application No. 111116745 (TW), filed on May 4, 2022.
Prior Publication US 2023/0359190 A1, Nov. 9, 2023
Int. Cl. G05B 23/00 (2006.01); G05B 23/02 (2006.01)
CPC G05B 23/027 (2013.01) [G05B 2223/02 (2018.08)] 10 Claims
OG exemplary drawing
 
1. A process capability index warning system for monitoring a test device configured to execute a plurality of test items, and the process capability index warning system comprising:
a warning parameter setting device configured to set a quantity threshold, a warning interval and an index threshold; and
a process capability index calculation device communicatively connected to the warning parameter setting device, wherein the process capability index calculation device determines whether or not a quantity of test samples of the test device within a present cycle of the warning interval is less than the quantity threshold;
wherein, when the quantity of the test samples is less than the quantity threshold, the process capability index calculation device accumulates the quantity of the test samples until an end of a next cycle of the warning interval;
when the quantity of the test samples is not less than the quantity threshold, the process capability index calculation device calculates and obtains a plurality of process capability index values that correspond to the plurality of test items, and further the process capability index calculation device determines whether or not the plurality of process capability index values is all greater than or equal to the index threshold; and
when at least one of the process capability index values is less than the index threshold, the process capability index calculation device sends a warning message.