بهبود زمان تکمیل فرایند طراحی بالگرد ترابری با استفاده از روش مبتنی بر ماتریس تبدیل کار

نوع مقاله: مقاله پژوهشی

نویسندگان

1 دانشجوی دکتری / گروه هوافضا، دانشکدة علوم و فنون نوین، دانشگاه تهران، تهران

2 عضو هیات علمی / گروه هوافضا، دانشکدة علوم و فنون نوین، دانشگاه تهران

چکیده

توسعة محصولات هوافضایی در کوتاه‌ترین زمان ممکن، از مهم‌ترین پارامترهای رقابتی در بازار به‌شمار می‌آید. این در حالی است که پیچیدگی ذاتی این محصولات سبب ایجاد چرخه‌های گستردة اطلاعاتی می‌شود که زمان تکمیل فرایند طراحی را به‌شکل چشم‌گیری افزایش می‌دهد. این واقعیت کاستن از زمان تکمیل در کنار حفظ کیفیت را به ضرورتی انکارناپذیر مبدل می‌کند. در این مقاله از طرح اجرایی با ریسک کمینه برای به‌سازی فرایند مفهومی طراحی بالگرد ترابری ای. اچ. 101، به عنوان مورد مطالعاتی، استفاده شده که برای مدیریت تکرارها و کاهش زمان تکمیل بر چارچوب ماتریس تبدیل کار استوار است. این طرح یک سیاست کاری را مطرح می‌کند که در آن وظایف طراحی با بیشترین سطح همگیری در گام‌های نخست طراحی مورد توجه قرار گرفته و با پیشرفت طراحی، دیگر وظایف به‌صورت تدریجی مورد توجه قرار می‌گیرند. جانمایة این طرح، چیدمان مؤثر وظایف طراحی در کنار کاستن از ریسک دوباره‌کاری است. نتایج شبیه‌سازی‌های زمان‌گسسته نشانگر برتری نسبی طرح پیشنهادی نسبت به مدل‌های رایج از منظر زمان تکمیل است. این در حالی است که در این روش در عمل ریسک بازخورد در پایین‌ترین سطح ممکن قرار می‌گیرد.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Minimum risk execution plan for conceptual design process of utility helicopter: a WTM-based method

نویسندگان [English]

  • Mohammad Haji Jafari 1
  • Amirreza Kosari 2
  • Mehdi Fakoor 2
1 Phd Student, Aerospace Group, FNST, University of Tehran, Tehran
2 Associate Professor, Aerospace Group, FNST, University of Tehran
چکیده [English]

Developing aerospace products in the shortest possible time is one of the most important market competitive parameters. Meanwhile, inherent complexity of these products leads to large information cycles that increase completion time, significantly. As a result, the shortest completion time beside acceptable quality becomes an inevitable necessity. In this paper, “Minimum-Risk Execution Plan (MREP)” is used to improve the conceptual design process of EH101 utility helicopter as the case study. The plan is formed around iteration management and reducing completion time in framework of Work Transformation Matrix (WTM). MREP is a work policy based on beginning with tasks with the highest couplings and by progressing the design process, adding the others in a gradual manner. The method can be described as the art of effective arrangement of design tasks while observing rework risk. Discrete-time simulation results show the supremacy of the proposed method over existing models in regard of completion time while the rework risk is maintained in the lowest possible level.

کلیدواژه‌ها [English]

  • design structured matrix (DSM)
  • work transformation matrix (WTM)
  • design process improvement
  • minimum risk
  • work policy

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