Some Group Inspection Based Multi-Attribute Control Charts to Identify Process Deterioration
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M. P. Gadre
Abstract
In a production process, when quality of the product depends on more than one characteristic, ‘Multivariate Quality Control’ (MQC) techniques are used. Many MQC techniques have been developed to control multivariate variable processes, but not much work has been reported on multivariate attribute processes. In this article, we propose some group inspection based multi-attribute control charts to identify process deterioration. The charts proposed are the ‘Multi-Attribute np’ (MA – np) chart, the ‘Multi-Attribute Synthetic’ (MA – Syn) chart and the ‘Multi-Attribute Group Runs’ (MA – GR) chart. The charts are developed by using MP-test based on the exact distribution. It is numerically illustrated that, MA – GR chart performs better than the other two charts. Also in steady state MA – GR chart performs better than MA – np and MA – Syn control charts. A procedure of identifying the attributes causing signal is also proposed.
© Heldermann Verlag
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Articles in the same Issue
- 2005 - The Jakob Bernoulli Year 350th Anniversary of Jakob's Birth and 300th Anniversary of Jakob's Death
- Six Sigma the “Breakthrough Management Strategy”?
- Determining the Parameters of a Multinomial Distribution: The Fiducial Approach
- Some Group Inspection Based Multi-Attribute Control Charts to Identify Process Deterioration
- On Cumulative Conforming Type of Control Charts for High Quality Processes Under Sampling Inspection
- Monitoring Process Mean and Process Variance Using Collani's Statistic
- Ratio of Logistic and Bessel Random Variables
- Weibull Extension of a Bivariate Exponential Regression Model
- Weighted Least Squares Estimators for a Change-Point
- A Note on the Appropriateness of Taguchi's Loss Function
- Acceptance Sampling Based on the Inverse Rayleigh Distribution
- An Alternative Simple Proof of a Result Useful in Reliability Shock Models
- Draft International Standard ISO/DIS 2210: Milk and Milk Products
