تعیین مقدار سفارش اقتصادی با ملاحظه کیفیت کالاها، بازبینی مخرب، دوباره‏کاری و مروری بر کمبود و اقلام ناقص

نوع مقاله: مقاله پژوهشی

نویسندگان

1 دانشجوی دکترا، مهندسی صنایع، دانشکده مدیریت و فناوری‌های نرم، دانشگاه صنعتی مالک اشتر

2 دانشیار، گروه مدیریت سیستم و بهره وری، دانشکده مدیریت و فناوری‌های نرم، دانشگاه صنعتی مالک اشتر

3 استادیار، گروه مدیریت سیستم و بهره وری، دانشکده مدیریت و فناوری‌های نرم، دانشگاه صنعتی مالک اشتر

چکیده

از جمله‏ ی مهم‏ترین فرض‏های غیرواقعی مدل مقدار سفارش اقتصادی، کیفیت تمام و کمال کالاهای رسیده به انباراست. در این مقاله در تلاش برای فائق آمدن بر این محدودیت‏ و نزدیک ساختن این مدل‏ به شرایط واقعی، بازبینی‏های مخرب و وجود اقلام غیرکامل و مردود بعد از دوباره‏کاری را در نظر گرفته شده است. در سه حالت (1- عدم نگهداری اقلام غیر‏کامل و قابل دوباره‏کاری بعد از بازبینی، 2- نگهداری اقلام مذکور تا پایان دوره بازبینی ، 3- نگهداری این اقلام تا پایان دوره) مقدار سفارش اقتصادی تعیین شده است. همچنین نتایج نشان می دهد که اگر از مدل سنتی به جای مدل جدید و اصلاح شده استفاده شود، با افزایش هزینه مواجه خواهیم شد. به عبارتی با افزایش مجموع نسبت اقلام غیرکامل و قابل دوباره‏کاری، مقدار سفارش اقتصادی و هزینه کل در واحد زمان افزایش می‏یابد. از حل مثال عددی هم برای بررسی نتایج کمک گرفته شده است.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Determining EOQ Regarding the Quality of Products, Destructive Inspection, Reworking and a Review of Shortage and Deteriorating Items

نویسندگان [English]

  • Hassan Torabi 1
  • Mohammad Hossein karimi gavareshki 2
  • Morteza Abbasi 3
1 Ph.D. Student in industrial engineering, Faculty of Management and soft technologies Malek Ashtar University of Technology, Tehran , Iran.
2 Associate Prof., Faculty of Management and soft technologies Malek Ashtar University of Technology, Tehran , Iran.
3 Assistant Prof., Faculty of Management and soft technologies Malek Ashtar University of Technology, Tehran , Iran.
چکیده [English]

Among the most important unrealistic assumptions of EOQ model is the perfect quality of items received in stock. Trying to overcome this constraint and making the mentioned model get closer to real circumstances, this paper considers destructive inspections and the existence of imperfect and rejected items after reworking.  EOQ is determined under three following conditions: 1- rejecting the imperfect and reworkable items after the inspection 2-keeping the aforementioned items until the end of the inspection period, and 3- keeping these items until the end of the cycle. Results show that using the traditional model instead of the modified new model will lead to increased costs. In other words, with an increase in total proportions of imperfect and reworkable items, EOQ and the total cost per unit of time will increase. A numerical example is solved to evaluate the results.

کلیدواژه‌ها [English]

  • Cost
  • EOQ
  • Imperfect Items
  • Inspection
  • Rework

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