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Case Problem: NORTHWOODS BACKPACKERS
Case Information
The current system of Northwoods Backpackers:
- 5 workstations
- ·Ó§Ò¹ 8 ªÑèÇâÁ§µèÍÇѹ 5 ÇѹµèÍÊÑ»´ÒËì
- àÇÅÒ·Õè Operator ãªé㹡ÒÃÃѺ Order ÅÙ¡¤éÒáµèÅФÃÑé§ ÁÕ¡ÒáÃШÒÂẺ exponential áÅÐÁÕ¤èÒà·èҡѺ 3.6 ¹Ò·Õ (1/µ = 3.6)
- ÍѵÃÒ¡ÒÃà¢éÒÃѺºÃÔ¡ÒâͧÅÙ¡¤éÒ·Õè¤Ò´ÇèÒ¨Ðâ·ÃÈѾ·ìà¢éÒÁÒÀÒÂ㹪èǧÇѹËÂØ´ ÁÕ¡ÒáÃШÒÂẺ Poisson â´ÂÁÕÍѵÃÒ¡ÒÃà¢éÒÃѺºÃÔ¡ÒÃà»ç¹ 175 ÊÒµèͪÑèÇâÁ§ ( ? = 175 )
- Ãкº¡ÒÃãËéºÃÔ¡ÒÃà»ç¹áºº FIFO
- ÂÍ´¢Ò·ÕèàÊÕÂ仨ҡ¡ÒÃãËéºÃÔ¡ÒÃäÁè·Ñ¹ ÁÕ¤èÒ»ÃÐÁÒ³ $100,000
Goals (Objective) of the new system:
- Save $135,000 in lost sales
- Å´ÃÐÂÐàÇÅÒ㹡ÒÃÃÍÊÒ¢ͧÅÙ¡¤éÒãËéäÁèà¡Ô¹ 0.5 ¹Ò·Õ (one-half minute)
- 70% ¢Í§ÅÙ¡¤éÒ·Õèâ·Ãà¢éÒÁÒä´éÃѺºÃÔ¡Ò÷ѹ·Õ
The 4 Alternatives to be considered for new systems:
Alternative 1 ·Ó§Ò¹ 8 ªÑèÇâÁ§µèÍÇѹ 5 ÇѹµèÍÊÑ»´ÒËì
- àÇÅÒ·Õè Operator ãªé㹡ÒÃÃѺ Order ÅÙ¡¤éÒáµèÅФÃÑé§ ÁÕ¡ÒáÃШÒÂẺ exponential áÅÐÁÕ¤èÒà·èҡѺ 3.6 ¹Ò·Õ (1/µ = 3.6 minute or 0.06 hour)
- ÍѵÃÒ¡ÒÃà¢éÒÃѺºÃÔ¡ÒâͧÅÙ¡¤éÒ·Õè¤Ò´ÇèÒ¨Ðâ·ÃÈѾ·ìà¢éÒÁÒÀÒÂ㹪èǧÇѹËÂØ´ ÁÕ¡ÒáÃШÒÂẺ Poisson â´ÂÁÕÍѵÃÒ¡ÒÃà¢éÒÃѺºÃÔ¡ÒÃà»ç¹ 175 ÊÒµèͪÑèÇâÁ§ ( ? = 175 )
- ¾Ô¨ÒóҨӹǹ workstations ·ÕèàËÁÒÐÊÁ â´ÂËéÒÁÅ´¨Ó¹Ç¹ Workstations ŧ á¡à»ç¹ 6 ¡Ã³Õ ¤×Í 5,6,7,8,9,10 workstations â´Â¡ÒÃà¾ÔèÁ¨Ó¹Ç¹ workstations ¨ÐµéͧÁÕ¤èÒãªé¨èÒÂà¾ÔèÁàµÔÁÊÓËÃѺáµèÅÐ workstations ·Õèà¾ÔèÁ¢Öé¹
Alternative 2 à¾ÔèÁ»ÃÔÁÒ³¡ÒÃãËéºÃÔ¡ÒÃà»ç¹ 16 ªÑèÇâÁ§µèÍÇѹ áÅзӧҹ 5 ÇѹµèÍÊÑ»´ÒËìµÒÁà´ÔÁ
- ÍѵÃÒ¡ÒÃà¢éÒÃѺ ...