Question

At the Venice Garden restaurant chain, when orders come into the kitchen via a touchscreen computer system, the order is given a processing time. When the order preparation exceeds this time, computer screens positioned every few feet along the order assembly line turn red. The restaurant manager monitored the number of ‘late” orders by randomly visiting the kitchen during its busiest times between 6 P.M. and 10 P.M. on Friday and Saturday evenings for 12 weekends, and counted the number of red screens, collecting the following sample results for the number of orders that exceeded their projected processing times.


Construct a c-chart with 3o limits for invoice errors and indicate if the process was out of control at anytime.


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  • CreatedApril 10, 2014
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