=11.18. Consider the M/G/1 model with 0.2 and 0.25.

E

a. Use the Excel template for this model to generate a data table that gives the main measures of performance—L, Lq, W, Wq—for each of the following values of : 4, 3, 2, 1, 0.

b. What is the ratio of Lq with 4 to Lq with 0?

What does this say about the importance of reducing the variability of the service times?

c. Calculate the reduction in Lq when is reduced from 4 to 3, from 3 to 2, from 2 to 1, and from 1 to 0. Which is the largest reduction? Which is the smallest?

E

d. Use trial and error with the template to see approximately how much would need to be increased with 4 to achieve the same Lq as with 0.25 and 0.

E

e. Use the template to generate a data table that gives the value of Lq with 4 when increases in increments of 0.01 from 0.25 to 0.35.

E

f. Use the template to generate a two-way data table that gives the value of Lq for the various combinations of values of and where 0.22, 0.24, 0.26, 0.28, 0.3 and 4, 3, 2, 1, 0.