NDLI: A case study of SPC in circuit board assembly: statistical mounting process control

Content Provider	IEEE Xplore Digital Library
Author	Liukkonen, T. Tuominen, A.
Copyright Year	2004
Description	Author affiliation: Nokia Corp., Finland (Liukkonen, T.)
Abstract	A system was developed to continuously monitor the cycle times of successive placement machines in a long high-speed surface mount line. Statistical process control software was created to generate predefined out-of-control alarms when an unexpected change is monitored in the cycle times. The developed Statistical Mounting Process Control application was divided into three monitoring levels: line performance view, machine performance view, and pickup performance view (i.e, component feeders and nozzles). Most of the problems causing unexpected increase in placement cycle time are directly related to bad performing feeders or nozzles. The data transfer between the machines and host computer system is described. Out-of-control criterias selected for this statistical process control application are discussed in detail. One typical out-of-control situation is described for fast action and response to get the placement - process back to right track again. Promising results were observed after several weeks of evaluation of the system in two production lines: component pickup errors were decreased about 50%. In the future this is expected to have a direct positive impact on the output of the factory as well as on the total material cost and unexpected shortages, because component waste is simultaneously decreased. A theory is also discussed about poor pick-up performance having possible negative effect on the placement accuracy.
Starting Page	445
Ending Page	448
File Size	375250
Page Count	4
File Format	PDF
ISBN	0780381661
DOI	10.1109/ICMEL.2004.1314857
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2004-05-16
Publisher Place	Serbia
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Printed circuits Assembly Process control Condition monitoring Application software Computerized monitoring Production systems Production facilities Waste materials Costs
Content Type	Text
Resource Type	Article

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

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