مجله بین‌المللی انجمن آهن و فولاد ایران

مجله بین‌المللی انجمن آهن و فولاد ایران

بهبود تولید لوازم خانگی فولادی از طریق شبیه سازی و ارزش شاخص نزدیکی خاکستری

نوع مقاله : مقاله پژوهشی

نویسندگان
چکیده
بهبود بهره‌وری فرایند تولید یکی از مهم‌ترین اهداف شرکت‌های تولیدی برای کاهش هزینه‌ها و افزایش توان رقابت در بازار است. شناسایی و رفع گلوگاه‌های فرایندی نقش کلیدی در ارتقاء بهره‌وری ایفا می‌کند. این مسئله در صنعت محصولات فولادی به‌دلیل پیچیدگی و مقیاس بزرگ خطوط تولید از اهمیت بیشتری برخوردار است. در این پژوهش، بهبود بهره‌وری فرایند تولید سینک در شرکت فولاد البرز با استفاده از شبیه‌سازی رویداد گسسته و روش تصمیم‌گیری چندمعیاره خاکستری مورد بررسی قرار گرفته است.
در ابتدا با استفاده از شبیه‌سازی، شرایط فعلی خط تولید و گلوگاه‌های موجود شناسایی شد و پنج سناریوی پیشنهادی برای بهبود فرایند ارزیابی گردید. این سناریوها شامل نگهداری و تعمیرات پیشگیرانه، افزودن اپراتور، برون‌سپاری بخشی از فرایند، افزودن یک دستگاه جدید و ترکیب این چهار راهکار هستند. نتایج نشان داد که ترکیب چهار سناریوی مذکور می‌تواند بهره‌وری تولید را ۶.۰۸ درصد افزایش داده و میزان ضایعات را ۲۷.۱۳ درصد کاهش دهد. همچنین تعداد نیروی انسانی در فرایند تولید نیز ۶.۶۶ درصد افزایش خواهد یافت.
با این حال، برای اولویت‌بندی سناریوها لازم است معیارهایی مانند هزینه، ارتقاء توان فنی شرکت و سهولت اجرا نیز مدنظر قرار گیرد. از این رو، در فرآیند تصمیم‌گیری چندمعیاره از روش «ارزش شاخص نزدیکی» استفاده شد. با توجه به ماهیت احتمالی نتایج شبیه‌سازی و عدم قطعیت در نظرات کارشناسان، نسخه خاکستری این روش توسعه یافت. در نهایت، اولویت‌بندی سناریوها بر اساس نتایج شبیه‌سازی و معیارهای کارشناسی به ترتیب شامل: نگهداری و تعمیرات پیشگیرانه، افزودن اپراتور، افزودن دستگاه جدید، و برون‌سپاری بخشی از فرایند بود.
کلیدواژه‌ها
موضوعات

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