In which of the following situations would you expect MRP to work well? To work poorly?

a. A fabrication plant operating at less than 80% of capacity with relatively stable demand

b. A fabrication plant operating at less than 80% of capacity with extremely lumpy demand

c. A fabrication plant operating at more than 95% of capacity with relatively stable demand

d. A fabrication plant operating at more than 95% of capacity with extremely lumpy demand

e. An assembly plant that uses all purchased parts and highly flexible labor (i.e., so that effective capacity can be adjusted over a wide range)

f. An assembly plant that uses all purchased parts and fixed labor (i.e., capacity) running at more than 95% of capacity.