A v-belt-driven roller conveyor is used to convey cartons from the order picking area in a warehouse to the order accumulation and packing area in the warehouse. The conveyor is 250 long. Rollers are 2.5 in diameter and are spaced on 7.5 centers. A WBR dimension of 30 is used. A variety of cartons are placed on the conveyor. The cartons are equally likely to be 12, 18, 24, 30, or 36 long; they are equally likely to weigh 5 lb, 10 lb, 15 lb, 20 lb, or 25 lb. The length and the weight are statistically independent.

The minimum design clearance between cartons is 6.

a. Determine the BV, LF, and FF values.

b. Determine the average load on the conveyor.

c. Determine the “worst case” load on the conveyor.