The two‐sided SPRT sign charts

RE Deore, SB Mahadik… - Quality and Reliability …, 2024 - Wiley Online Library
A two‐sided nonparametric sequential probability ratio test (SPRT) control chart for process
location is proposed. The mechanism of this chart is based on the SPRT for location based …

A two-sided SPRT control chart for process mean

SB Mahadik, DG Godase - Journal of Statistical Computation and …, 2024 - Taylor & Francis
ABSTRACT A two-sided sequential probability ratio test (SPRT) control chart for monitoring
the mean of a normal process is proposed in this paper. Its mechanism is based on the …

The combined Shewhart–EWMA sign charts

MK Shanshool, SB Mahadik… - Quality and …, 2024 - Wiley Online Library
The Shewhart control chart is a prominent tool for identifying the changes in process
parameters that are of large magnitude, however, it has reduced ability to identify the …

Re-Evaluating the SPRT Chart with Estimated Process Parameters When the Underlying Distributions Are Gamma, Lognormal, and Weibull

JW Teoh, WL Teoh, ZL Chong… - … Journal of Electrical …, 2024 - researchportal.hw.ac.uk
To reduce the impact of Phase-I parameter estimation on the performances of Phase-II
control charts, researchers have incorporated the ideology of Guaranteed In-control …

The sign chart with variable control and warning limits

MK Shanshool, SB Mahadik… - International Journal of …, 2024 - inderscienceonline.com
Control charts with variable design parameters demonstrate improved statistical
performance when compared to their counterparts with static design parameters. However …