تحلیل تأثیر عوامل مرتبط با سلول و عامل سرعت تقاضای مشتری بر عملکرد سلول ناب اولیه

نوع مقاله : مقاله پژوهشی

نویسنده

استادیار، دانشگاه شهید بهشتی.

چکیده

سلول ­هایی که در نخستین گام تحول ناب از طریق تغییر آرایش سیستم تولید، ایجاد می ­شوند، سلول­های اولیه نام دارند و عملکرد آن‌ها از این نظر که جزو نخستین اقدامات ناب­سازی عملیات تولید هستند، حائز اهمیت است. در این پژوهش عوامل مرتبط با انسان که نقش اساسی در تشریح عملکرد این سلول­ ها دارند در قالب عامل فاصله تخصیص پویا و به همراه دیگر عوامل مرتبط با سلول شامل اندازه سلول و نوع وظایف سلول مطالعه شده ­اند. زمان تکت به‌عنوان عامل مرتبط با مشتری مؤثر بر عملکرد سلول در نظر گرفته شده است. ابتدا مدل پژوهش بر مبنای تخصیص پویا و با لحاظ­ کردن اثرپذیری عملکرد اپراتور از نحوه تخصیص فرد طی افق برنامه ­ریزی در قالب ترکیب سه مدل متعادل‌سازی، تعیین توالی و تخصیص توسعه داده شد؛ سپس آزمایش‌ها بر اساس رویکرد طراحی آزمایش‌های تاگوچی اجرا شد و داده ­ها در قالب جواب‌های نزدیک به بهینه برای اهداف عملکردی سلول با استفاده از الگوریتم جست­وجوی همسایگی متغیر به ­دست آمد. در گام بعد با انجام تحلیل واریانس یک و چند متغیره، اثر عوامل آزمون شد. نتایج پژوهش حاکی از پیچیدگی تأثیرپذیری عملکرد سلول از عوامل بوده و تعداد تخصیص پویای پیشنهادی به ازای ترکیبات مختلف دیگر عوامل به ­دست آمده است.

کلیدواژه‌ها

عنوان مقاله [English]

Analyzing the Effects of Cell Related Factors and Takt Time on the Performance of Lean Interim Cells

نویسنده [English]

  • Ashkan Ayough
Assistant Professor, Shahid Beheshti University.
چکیده [English]

     Cells formed in the early steps of lean transformation called interim cells and their performance is so important because these are the first actions to make the production operations lean. In this study, human related factors which play an important role in demonstrating performance of lean cells have been studied in term of dynamic assignment interval along with cell related factors including cell size and type of dominant tasks in the cell. Takt time is considered as the factor related to customer influencing the performance of the cell. First, the mathematical model of research developed based on dynamic assignment and incorporating impressionability of operator's performance by the manner in which tasks assigned to him during several rotation periods. The model structured as the combination of balancing, sequencing and dynamic assignment models. Then, some experiments designed using Taguchi's approach and data as near optimal solutions gathered by running VNS algorithm on the model. After that, the effect of factors tested by applying ANOVA and MANOVA. The results shown that the impressionability of lean cell is a complex matter.so the number of dynamic assignments vesus various combination of factors have been proposed.

کلیدواژه‌ها [English]

  • Lean Interim Cell Performance
  • Cell Size
  • Cell Type
  • Takt Time
  • Dynamic Assignment Interval
  • Analysis of Variance

مراجع

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