Please review the following question and answer. Provide confirm if my answer is correct or not. If it is not correct please advise.
Question 1: A company has introduced a process improvement that reduces processing time for each unit, so that output is increased by 25% wtih less material, but one additional worker required. Under the old process, five workers could produce 60 units per hour. labor costs are $12/hour, material input was previously $16/unit. For the process, material is now $10/unit. Overhead is charged at 1.6 times direct labor cost. Finished units sell for $31 each. What increase in productivity is associated with the process improvement?
Question 2: Which of the following smoothing constants would make an exponential smoothing equal to a naive forecast?
a) 1.0,
b) 0.01,
c) 0.0,
d) 0.5,
e) none of the above.
Question 3: A manager uses this equation to predict demand: Y of t = 20+4t. Over the past 8 periods, demand has been as follows.
Period 1 2 3 4 5 6 7 8
Demand 25 28 31 34 36 43 50 54
i) are these results acceptable. Explain.
ii) use the model to forecast for May next year if t=0 in March this year.
Question 4:
On a project network, Activity A precedes B and C. Given the following information, determine the latest start time for activity A. EF = Earliest Finish; LF = Latest Finish
EF for B = 15. EF for C = 17. LF for B = 24. LF for C = 27. Activity times are A = 4, B = 6 and C = 8.
Question 5:
The cycle time for each stage of a 4 stage process are as follows:
Stage 1 = 10 seconds; Stage 2 = 20 seconds; Stage 3 = 15 seconds and Stage 4 = 10 seconds.
a) what is the process cycle time?
b) if the process needs to produce 200 units how long will it take to complete all the 200 units?
c) if an inventory buffer is placed between stages 1 and 2 how long will it take for Stage 1 to complete 200 units of its own task?
d) if an inventory buffer is placed between stages 1 and 2 how many units will the second stage complete out of its own task by the time the first stage completes these 200 units of its own task?
e) if an inventory buffer is placed between stages 1 and 2 how many units will the third stage complete out of its own task by the time the first stage completes these 200 units of its own task?