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  Little's Law    
  Cycle Time Performance = # of Vehicles in Process(keys in hand Authorization in hand)  
  Average # of Vehicle Delivered per day  
  Throughput Performance Index = Average repair hours per job  
  Average cycle time in days (using Little's Law)  
  Enter Shop Values in high-lighted boxes Calculations              
    Vehicles in process (average)  
    Vehicles Delivered per day  
  Cycle Time = Days            
    Average repair hours per job  
  TPI = Index