Process Capability Indices under Non-Normality Conditions using Johnson Systems
Journal Title: International Journal of Advanced Computer Science & Applications - Year 2019, Vol 10, Issue 3
Abstract
Process capability indices (PCIs) quantify the ability of a process to produce on target and within specifications performances. Basic indices designed for normal processes gives flawed results for non-normal process. Numerous methods have been proposed for non-normal processes to estimate PCIs in which some of them are based on transformation methods. The Johnson system comprising three types that translate a continuous non-normal distribution to normal. The aim of this paper is to estimate four basic indices for non-normal process using Johnson system with single straightforward procedure. The efficacy of the proposed approach can be assessed for all three Johnson Curves (SB, SU, SL) but result for SU is presented in this paper. PCIs for a data set are estimated and percentiles are obtained by our proposed exact method based on selected Johnson density function which was earlier based on approximate methods without any prior knowledge of density function of non-normal process. We compare our results with other existing methods to estimate PCIs for non-normal process. From statistical analysis we have noted that this modification improve process capability indices.
Authors and Affiliations
Suboohi Safdar, Dr. Ejaz Ahmed, Dr. Tahseen Ahmed Jilani, Dr. Arfa Maqsood
Keywords
Related Articles
- EP ID EP498678
- DOI 10.14569/IJACSA.2019.0100338
- Views 113
- Downloads 0
Effective Strategies for ROI and Image Matching
The paper presents an exceptional four matching strategies: systematic, random, gradient and simulated annealing using diferent metrics. We consider two kinds of image matching algorithms. The first one oriented on the w...
A Novel Approach for Ranking Images Using User and Content Tags
In this study, a tag and content-based ranking algorithm is proposed for image retrieval that uses the metadata of images as well as the visual features of images, also known as “visual words” to retrieve more relevant i...
Figural a Flexibility Test for Improving Creative Thinking in an Arabic Learning Environment A Saudi Arabia-Based Case Study
The capability of graduates to be flexible in the face of rapidly altering situations is an increasingly crucial requirement that teachers should be conscious of, given that persistent development and technological progr...
Systematic Literature Review (SLR) of Resource Scheduling and Security in Cloud Computing
Resource scheduling in cloud computing is a com-plex task due to the number and variety of resources available and the volatility of usage-patterns of resources considering that the resource setting is on the service pro...
Building BTO System in the Sanitary Materials Manufacturer with the Utilization of the High Accuracy Forecasting
In recent years, BTO (Build to Order) system is prevailing. It pursues short lead time, minimum stocks, and thereby minimum cost. But the high accuracy demand forecasting is inevitable for the parts manufacturers. In thi...