1. Based on the network table, develop the network diagram for the PERT chart. Determine the critical path. Which activities have floats? Activity Predecessor Duration A 5 B A 4 A 5 D B 6 E C F B,C 4 G DE 4 H 3 I F,G,H 2 2. Servicing time = 0.6 min, machine time = 1.5 min, walking time = 0.2 min, operator rate: $12/hour, machine cost: $15/hour. How many machines do you recommend based on the total expected cost? 3. There are 4 injector machines, and the machine goes down roughly 20% of the time. What is the probability of seeing 2 machines down? Calculate using the random servicing rule. 1 3 4. Based on flow process chart conventional symbols, how many operations and inspections occurred in this process? We are tracking the material. Sequence Event Description Forgings transported from forge shop 2 Inspection of incoming forgings Forgings moved and placed in storage 4 Storage Forgings retrieved from storage by hand truck Transport to machine shop Move to milling machine Delay in queue for milling machine Milling operation 10 Move to drill press al ON 9 5. In this example of the operation chart for subassembly, what is the third operation that could be conducted in a sequence? Please write the event description and the part name, Bracket Sheet metal Frame Sheet metal Motor Purchased Power cord Purchased Blank tank Capack Unpack Pierce Piero Inspect Inspect Bend Notch Separate leads Nickel plate Bend Assemble leads to motor Nickel plate Assemble Assemble motor to badet Inspect and test 6. In this From-To chart, please find the pair of operations that have the heaviest traffic. To operation 3 2 4 5 1 15 40 30 2 3 10 From operation i 20 25 50 4 5 7. In this Gantt chart, which activities are behind the expected schedule? DAY 4 2 3 5 Activities completed Dheduled Md work Lathe work Punch press Astembly 8. Operation process chart consists of five activities such as operation, inspection, transportation, delay and storage. True False 9. Please select a technique that does not belong to the macromotion study. a) Therbligs b) Flow diagram c) Flow process diagram 10. In synchronous servicing, operator servicing time (s) is 1 minute; total machine running time (m) is 2 minutes, and operator walking time (w) is 0.1 minute. If you calculate, this n value is not a whole number. If you choose a whole number, the operator will be idle some portion of the time. In this situation, how many machines will that be