The first approach to designing process layouts is used when it is difficult to obtain data on costs or volumes moved between departments. The second approach focuses on the costs associated with moving materials. Identify a major difference between these two approaches.

a. The first approach relies on materials-handling costs as the primary criterion while the second approach relies on a preference table that specifies the importance of two departments being close to one another.

b. The first approach relies on materials-handling costs as the primary criterion while the second approach uses the geometric centroid of each department.

c. The first approach uses the geometric centroid of each department while the second approach relies on materials-handling costs as the primary criterion.

d. The first approach relies on a preference table that specifies the importance of two departments being close to one another while the second approach relies on materials-handling costs as the primary criterion.