transactions. Waiting time (in minutes) Number of clients 0- 6 20 7- 13 24 14 - 20 18 21 - 27 12 28 - 34 35 - 41 1 Determine the following: 1. Class size 2. Number of classes 3. Classmark of the third class 4. Lower limit of the fourth class
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- A process is monitored for defective items by periodically taking a sample of 100 items and counting the number that are defective. In the last 50 samples, there were a total of 622 defective items. Is this enough information to compute the 3σ control limits for a p chart? If so, compute the limits. If not, state what additional information would be required.Determine the mean waiting time W for an M/M/2 system when lambda = 2 and μ = 1.2. Compare this with the mean waiting time in an M/M/1 system whose arrival rate is lambda = 1 and service rate is μ = 1.2. Since the arrival rate per server is the same in both cases and service times don’t vary, should the wait times be the same in both cases?A team of Industrial Engineers conducted a work sampling of identical machines being used for a manufacturing company and they have observed the following: Machine Type -----> % Idleness Machine 1 ----------> 20% Machine 2 ----------> 35% Machine 3 ----------> 15% Machine 4 ----------> 55% The machines are running based on the schedule of operation per shift. Shift Schedule: 6am – 2pm/ 2pm – 10pm/ 10pm – 6am Break Time: 1-hr meal break and 15 minutes coffee or short break per shift. Compute for the number of machines to acquire in 2 shifts
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