Results 261 to 270 of about 484,445 (306)

Frequency Distribution Supporting Recognition of Unnatural Patterns on Shewhart X-bar Chart

2001
This paper describes a method supporting recognition of unnatural patterns on a Shewhart X chart by analysis of its frequency distribution. It has been implemented as a program that simulates data from a statistically controlled process as well as from a process affected by patterns.
Jacek Nieckula
openaire   +2 more sources

X-bar Control Chart Patterns Identification Using Nelson’s Run Rules

Proceedings of the International Conference on Industrial Engineering and Operations Management, 2021
Munawar Zaman, Adnan Hassan
openaire   +3 more sources

Application of X-bar and R Control Chart on the Quality of the Final Product of Goat Milk Powder

, 2021
Yohana Agustina, J. Mulyo, Letari Rahayu Waluyati   +2 more
semanticscholar   +2 more sources

Optimum evaluation performance of adaptive X-bar control charts

Journal of Industrial and Production Engineering, 2021
Control charts are useful tools to regulate processes. Thereby the quality of products and services is enhanced which makes them more attractive to the customers.
Behin Elahi, Ali Deheshvar, Matthew Franchetti, Sadegh Amiri Tokaldany   +3 more
openaire   +1 more source

A control chart to monitor the process mean based on inspecting attributes using control limits of the traditional X-bar chart

, 2020
This paper proposes a new control chart, denoted by , for evaluating the stability of a process mean, which is based on attribute inspection. In the control chart, the mean of the quality characteristic of interest is controlled by a go-no-go gauge ...
R. Quinino, L. Ho, Frederico R. B. Cruz, Lupércio F. Bessegato   +3 more
semanticscholar   +1 more source

Chapter 12 Problem Solving — Variable and Attribute Charting or X Bar and R Bar Chart Development

, 2012
openaire   +2 more sources

Tutorial on Risk Adjusted X-Bar Charts

Quality Management in Health Care, 2001
Two data elements are needed for constructing a risk-adjusted X-bar chart. They are a continuous observed outcome collected over time across a sample of patients, and an expected outcome for each patient. The authors selected blood glucose levels to reflect diabetes control.
F, Alemi, T, Sullivan
openaire   +2 more sources

A simple procedure to improve the performance of Klein's 2‐of‐2 run rule in the Shewhart X¯$\bar{X}$ control chart

Quality and Reliability Engineering International, 2023
Supplementary run‐rules have been used since the 1950s to improve the performance of the basic Shewhart X¯$\bar{X}$ control chart. A procedure known as Klein's 2‐of‐2, a simple and efficient supplementary rule, signals that the process is out‐of‐control ...
V. B. Quinino, L. Ho, F. Cruz, R. Quinino   +3 more
semanticscholar   +1 more source

Robust economic-statistical design of X-bar control chart

International Journal of Production Research, 2015
Control charts are developed to monitor the service and production processes. The fact that many processes have uncertain parameters is a barrier to obtain the best design of the control charts. In this paper, economic statistical design (ESD) of the X-bar control chart utilising robust optimisation approach that considers interval estimates of ...
Abdul Sattar Safaei, Reza Baradaran Kazemzadeh, Heng-Soon Gan   +2 more
openaire   +1 more source

Grey relation pattern recogniser for X-bar control charts

International Journal of Manufacturing Technology and Management, 2000
This paper has developed an on-line pattern recogniser to detect unnatural patterns on control charts. The recogniser can assist in the correction of assignable causes. The recogniser presented here is based on the grey relation model which is used to calculate the degree of relative similarity between observations routinely collected from X-bar charts
Hsi-Mei Hsu, Yan-Kwang Chen
openaire   +1 more source