ارائه رویکردی برای پایش پارامترهای پروفایلهای‌ خطی ساده در فرآیندهای تولید کوتاه مدت در فاز 2

نوع مقاله : مقاله پژوهشی

نویسندگان

1 گروه مهندسی صنایع، دانشگاه پیام نور، مرکز تهران شمال

2 گروه مهندسی صنایع، دانشکده فنی و مهندسی، دانشگاه شاهد

3 گروه مهندسی صنایع، دانشگاه شاهد

چکیده

امروزه به دلیل تنوع تقاضای مشتری و حضور کوتاه محصول در بازار، استراتژی ساخت و تولید به سمت فرایندهای تولید کوتاه مدت سوق یافته است. در این شرایط فاز 1 نمودار کنترل نمی‌‌تواند انجام شود و برآوردهای صحیحی برای پارامترهای فرآیند در دسترس نمی‌باشد، لذا طراحی نمودارهای کنترل جدید برای پایش چنین فرایندهایی ضروری است. همچنین گاهی کیفیت به وسیله رابطه‌ای بین یک متغیر پاسخ و یک متغیر مستقل توصیف می‌شود که به آن پروفایل خطی ساده گفته می‌شود. در این مقاله به منظور پایش پارامترهای پروفایلهای خطی ساده در فرایندهای تولید کوتاه مدت، سه نمودار در فاز 2 طراحی شده است که توانایی پایش پارامترهای پروفایل مذکور را داشته و بروزرسانی آنها را از همان ابتدای فرآیند مدنظر قرار می‌دهد. عملکرد نمودارهای پیشنهادی با نمودار کنترل رقیب بر اساس معیار متوسط طول دنباله مقایسه شده است. نتایج بیانگر عملکرد مناسب نمودارهای کنترل پیشنهادی درکشف تغییرات متوسط و بزرگ می‌باشد.

کلیدواژه‌ها


عنوان مقاله [English]

Developing an Approach for Monitoring Simple Linear Profiles Parameters in Short Run Processes in Phase ΙΙ 

نویسندگان [English]

  • Seyed Babak Khalili Deilami 1
  • Amirhossein Amiri 2
  • Peyman Khosravi 3
1 M.Sc in Industrial Engineering, Department of Industrial Engineering ,Faculty of  Engineering ,North Tehran Branch, Payame Noor University, Tehran, Iran  
2 Associate Professor in Industrial Engineering, Department of Industrial Engineering, Faculty of Engineering, Shahed University, Tehran, Iran 
3 M.Sc in Industrial Engineering, Department of Industrial Engineering,  Faculty of Engineering, Shahed University, Tehran, Iran. 
چکیده [English]

Nowadays due to diversity of customer demand and short time for product evolution cycle in market, manufacturing strategy is tended to short run processes characterized by high diversity and low volume. Hence, statistical process control for such processes because of inspection restrictions in a short period is a special and significant practice. In such circumstances, control charts in Phase I cannot be performed and also correct estimations are not available for appraising process parameters. Therefore, it is essential to design new control charts and to utilize them instead of traditional control charts for monitoring such processes. On the other hand, sometimes quality characteristics are described by a relationship between a response variable and one or more explanatory variables, referred to as profile in the literature. In this paper for monitoring quality characteristics delineated by simple linear profiles in short run processes, three control charts are designed to monitor profile parameters (intercept, slope and standard deviation).These control charts have a capability to update the parameter estimations along with new observations and concurrent checks of the out-of-control conditions. The Performance of the proposed method has been compared with competitor control chart by using simulation studies and average run length criterion. The results show that proposed method in some parameters has better performance compared to the competitor control chart in detecting moderate and large shifts.              

کلیدواژه‌ها [English]

  • Average run length
  • Profile monitoring
  • short run processes
  • Simple linear profile
  • Statistical process control 
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