1.5. Estimating Productivity

Try these first

1. 1.

   What is the ideal angle of swing for maximum productivity?

   Hint

   Think about the position between digging and dumping.

2. 2.

   What happens to productivity when the angle of swing is increased?

   Hint

   Consider the impact on cycle time.

3. 3.

   What is the ideal angle of swing to maximize productivity?

   • 45 degrees
   • 90 degrees
   • 120 degrees

   Hint

   Think about the position of the truck relative to the excavator.

4. 4.

   True or False: Increasing the height of cut improves productivity.

   • True
   • False

   Hint

   Recall how productivity factors relate to height optimization.

5. 5.

   A shovel has a heaped bucket volume of 4 cubic meters, a fill factor of 0.8, and operates at an actual height of cut of 3 meters with an optimum height of 4 meters. Calculate its productivity if the cycle time is 30 seconds.

   Hint

   Pay attention to the difference between actual and optimum heights.

6. 6.

   Discuss how changes in the truck availability can alter the overall productivity of an excavation site and propose a management strategy to optimize machine scheduling.

   Hint

   Consider how efficient truck scheduling can minimize idle times.