4. Correction Factors in Productivity Estimation

Try these first

1. 1.

   What is cycle time?

   Hint

   Think about what operations a bulldozer performs.

2. 2.

   Name one factor that affects maneuver time.

   Hint

   Consider how the bulldozer is controlled.

3. 3.

   What does cycle time include?

   • Only push time
   • Push time and backtrack time
   • Push time
   • backtrack time
   • and maneuver time

   Hint

   Think about what happens in a full operation.

4. 4.

   True or False: Correction factors are important only if performance curves are 100% accurate.

   • True
   • False

   Hint

   Consider how real-world scenarios differ from ideal conditions.

5. 5.

   If a bulldozer’s ideal productivity, as per manufacturer's curve, is 500 m³/hour, and correction factors for operator skill (0.85) and visibility (0.9) must be applied, what is the actual productivity?

   Hint

   Multiply the ideal productivity by both correction factors sequentially.

6. 6.

   A bulldozer with a total cycle time of 10 minutes operates at a job efficiency of 25 minutes per hour. How many cubic meters can it potentially move if the ideal production rate is set at 400 m³/hour?

   Hint

   Adjust the ideal production rate to reflect the hourly operation time.