Amy is assigned to a team for a project. She is responsible for activity D in the project, but she only has partial information about the activity network shown below: Which of the following observation is NOT true? There exists an activity with the earliest completion time equal to 4 . There exists an activity with the latest start time equal to 8 . This is not the last activity. This is not the first activity. Which of the following is NOT a concern of the PERT method? The activity time may not be independent of each other. The critical path based on mean activity times may not always be the longest path. The method is based on the assumption of the central limit theorem. The analysis is based on the worst-case scenarios. A call center takes four activities in serving a customer. Activities A, B, and D are staffed by one employee, and activity C has two employees (for a total of five employees). The processing time for each activity is given as follows: Assume demand is unlimited. What is the cost of direct labor in \$ per customer? $1.8/ customer $2/ customer $1.5/ customer $1.2/ customer The following table shows the mean and variance time of all activities in an activity network: Suppose the path A-B-C-F is the only possible critical path in this activity network. What is the probability that the project can be completed with 10 hours? (HINT: you can use Excel or the z-table to find the probability) 99.44%98.73%93.14%87.92% If we want to estimate the mean and variance of activity times, which of the following information is not needed? The shortest activity time in the best-case scenario. The most frequently observed activity time. The least frequently observed activity time. The longest activity time in the worst-case scenario. QUESTION 15 There are five activities in completing a meal. The processing time of each activity is given below, and the activities must be done in this The manager receives four proposals for the workload. Which of the following is MOST LIKELY to achieve efficiency? Hire three workers. Employee A prepares and washes, employee B cuts and employee C completes the remaining activities. Hire four workers. Employee A prepares and washes, employees B and C cut, and employee D completes the remaining activities. Hire three workers. Employee A prepares, employee B washes and cuts, and employee C completes the remaining activities. Hire five workers, and each of them is assigned to one activity. Which of the following statements of the critical path method (CPM) is NOT TRUE? It's possible to have more than one activity with the earliest start time equal to zero. For an activity, the earliest completion time cannot be smaller than the activity time. For an activity, the earliest completion time cannot be smaller than the latest start time. For an activity, the earliest start time should be greater than or equal to all the earliest completion times of its predecessor activities. QUESTION 17 Which of the following statements about the total idle time is INCORRECT? The total idle time increases if the number of employees increases. The total idle time increases if the flow rate increases. The total idle time decreases if the average labor utilization increases. The total idle time decreases if the processing time of the bottleneck resource increases. QUESTION 18 Complex Health operates 15 hours a day to produce 2400 bottles of vitamin C per day. It requires 3 minutes for a worker to complete a bottle of the vitamin. What is the takt time of Complex Health in minutes per bottle, and what is the target manpower? 0.375;8 0.75;4 0.625;5 0.125;24 Amy is assigned to a team for a project. She is responsible for activity D in the project, but she only has partial information about the activity network shown below: Which of the following observation is NOT true? There exists an activity with the earliest completion time equal to 4 . There exists an activity with the latest start time equal to 8 . This is not the last activity. This is not the first activity. Which of the following is NOT a concern of the PERT method? The activity time may not be independent of each other. The critical path based on mean activity times may not always be the longest path. The method is based on the assumption of the central limit theorem. The analysis is based on the worst-case scenarios. A call center takes four activities in serving a customer. Activities A, B, and D are staffed by one employee, and activity C has two employees (for a total of five employees). The processing time for each activity is given as follows: Assume demand is unlimited. What is the cost of direct labor in \$ per customer? $1.8/ customer $2/ customer $1.5/ customer $1.2/ customer The following table shows the mean and variance time of all activities in an activity network: Suppose the path A-B-C-F is the only possible critical path in this activity network. What is the probability that the project can be completed with 10 hours? (HINT: you can use Excel or the z-table to find the probability) 99.44%98.73%93.14%87.92% If we want to estimate the mean and variance of activity times, which of the following information is not needed? The shortest activity time in the best-case scenario. The most frequently observed activity time. The least frequently observed activity time. The longest activity time in the worst-case scenario. QUESTION 15 There are five activities in completing a meal. The processing time of each activity is given below, and the activities must be done in this The manager receives four proposals for the workload. Which of the following is MOST LIKELY to achieve efficiency? Hire three workers. Employee A prepares and washes, employee B cuts and employee C completes the remaining activities. Hire four workers. Employee A prepares and washes, employees B and C cut, and employee D completes the remaining activities. Hire three workers. Employee A prepares, employee B washes and cuts, and employee C completes the remaining activities. Hire five workers, and each of them is assigned to one activity. Which of the following statements of the critical path method (CPM) is NOT TRUE? It's possible to have more than one activity with the earliest start time equal to zero. For an activity, the earliest completion time cannot be smaller than the activity time. For an activity, the earliest completion time cannot be smaller than the latest start time. For an activity, the earliest start time should be greater than or equal to all the earliest completion times of its predecessor activities. QUESTION 17 Which of the following statements about the total idle time is INCORRECT? The total idle time increases if the number of employees increases. The total idle time increases if the flow rate increases. The total idle time decreases if the average labor utilization increases. The total idle time decreases if the processing time of the bottleneck resource increases. QUESTION 18 Complex Health operates 15 hours a day to produce 2400 bottles of vitamin C per day. It requires 3 minutes for a worker to complete a bottle of the vitamin. What is the takt time of Complex Health in minutes per bottle, and what is the target manpower? 0.375;8 0.75;4 0.625;5 0.125;24