Variation reduction for multistage manufacturing processes: a comparison survey of statistical-process-control vs stream-of-variation methodologies

2010 ◽  
Vol 26 (7) ◽  
pp. 645-661 ◽  
Author(s):  
Jian Liu
Keyword(s):  
Process Control ◽  
Statistical Process Control ◽  
Manufacturing Processes ◽  
Statistical Process ◽  
Variation Reduction ◽  
Multistage Manufacturing ◽  
Stream Of Variation

Application of Statistical Process Control Tools to Improve Product Quality in Manufacturing Processes

2011 ◽  
Vol 110-116 ◽  
pp. 4023-4027
Author(s):  
Omar Bataineh ◽  
Abdullah Al-Dwairi
Keyword(s):  
Quality Control ◽  
Process Control ◽  
Statistical Process Control ◽  
Control Charts ◽  
Process Capability ◽  
Manufacturing Processes ◽  
Statistical Process ◽  
Free Products ◽  
Drug Companies

Quality control and improvement at the process level is a vital activity for the achievement of defect-free products in various manufacturing processes. This study employs statistical process control (SPC) tools such as control charts and process capability ratio for quality control and improvement. The control charts employed are , R and the cumulative-sum (CUSUM). The process capability ratio used is the so called process capability index (PCI). These tools have been implemented with the aid of Minitab® statistical software. In this study, the manufacturing process of gelatin capsules is investigated in terms of quality of the capsules, which are produced and shipped for use by various drug companies. As a result of implementation of SPC tools, an expected reduction in the number of defective capsules by 29% relative to the stage before implementation was achieved.

Study of Statistical Process Control for Multi Specification and Small Batch Production Based on Group Technology

2011 ◽  
Vol 219-220 ◽  
pp. 713-717
Author(s):  
Fa Jiang He ◽  
Ming Hong Wang ◽  
Yue Wang
Keyword(s):  
Process Control ◽  
Statistical Process Control ◽  
Group Technology ◽  
Similarity Theory ◽  
Manufacturing Processes ◽  
Code System ◽  
Batch Production ◽  
Statistical Process ◽  
Sample Data ◽  
Parts Manufacturing

For the multi specification and small batch productions, because of small batch and short manufacture cycle of product, it is difficulty to get enough sample data used for setup control chart to Statistical Process Control (SPC) of manufacture process quality by traditional SPC method. A new part code system based on OPTIZ code system is proposed by coding parts, manufacturing processes and qualities according to Group Technology (GT) based on similarity theory, so characteristics of parts, manufacturing processes and qualities are transformed to code, analyzed and judged by similarity theory to enlarge sample data, to realize SPC by control chart method. A SPC program for multi specification and small batch production based on group technology is developed by Visual Basic software and verified by actual example.

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