ESI 6529 DIGITAL SIMULATION TECHNIQUES

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ESI 6529 DIGITAL SIMULATION TECHNIQUES

• A Restaurant Example

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A RESTAURANT EXAMPLE

• Modify the restaurant problem in Example 5
  of Lecture 3 to include waiters. After a table
  for the appropriate party size becomes available,
  a waiter picks up the customers from the waiting
  area and escorts them to the dinning area of the
  restaurant. Upon arriving at the dinning area,
  the waiter takes the food order (20 percent of
  the service time). The waiter then delivers the
  food order to the kitchen and returns to the
  waiting area. When the order is ready (80 percent
  of the service time), the same waiter is
  requested to take the food to the dinning area.
  After delivering the food to the customers, the
  waiter remains in the dinning area until another
  request is made. When the customers finish their
  meals, they make their way to the cashier on
  their way out.
• Assume that the cashier and the waiting area in
  the same location. The waiter travels 100 feet
  per minute. Travel distances between the areas
  are as follows

Simulate the system once with 3 waiters
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THE EXPERIMENT FILE Restaurant2.EXP

• BEGIN
• PROJECT, Restaurant 2, ISE
• ATTRIBUTES PartySize Waiter
• VARIABLES Door, 10000
• QUEUES TableQ, CashierQ WaiterQ FoodQ
• RESOURSES Table, 50 Cashier
• STATIONS WaitArea Dining Kitchen
• TRANSPORTERS Waiter, 3, DISTANCE(1), 100,
  WaitArea
• DISTANCE 1, WaitArea-Dining-100,
  WaitArea-Kitchen-100, Dining- Kitchen-150
• COUNTERS Lost Parties Served Parties
• DSTATS NR(Table), Number of busy tables
• NQ(TableQ), Number of waiting parties
• NR(Cashier)100, Cashier Utilization
• NQ(CashierQ), Number of waiting for
  cashier
• NT(Waiter), Number of busy waiters
• REPLICATE, 1
• END

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THE MODEL FILE Restaurant2.MOD

• BEGIN
• CREATE EXPO(1.6), Door
• BRANCH, 1 IF, TNOW lt 240, Open ELSE,
  Closed
• Closed ASSIGN Door 0
• DISPOSE
• Open ASSIGN PartySizeDISC(.4,2,.7,3,.9,4,1.0,5)
  
• QUEUE, TableQ, 5, Leave
• SEIZE Table, (PartySize1)/2
• QUEUE, WaiterQ
• REQUEST Waiter(SDS, Waiter), 100, WaitArea
• MOVE Waiter, Dining
• DELAY TRIA(14,19,24)0.2
• MOVE Waiter, Kitchen
• DUPLICATE1, Food
• MOVE Waiter, WaitArea
• FREE Waiter
• DISPOSE

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THE MODEL FILE Restaurant2.MOD

• Food DELAY TRIA(14,19,24)0.8
• REQUEST Waiter(Waiter), 100, Kitchen
• MOVE Waiter, Dining
• FREE Waiter
• DELAY NORM(24,5)
• RELEASE Table, (PartySize1)/2
• QUEUE, CashierQ
• SEIZE Cashier
• DELAY NORM(1.5, .5)
• RELEASE Cashier
• COUNT Served Parties
• DISPOSE
• Leave COUNT Lost Parties
• DISPOSE