1.4. Effect of Trucks on Productivity

Try these first

1. 1.

   What is the balance number of trucks for a loader if the truck cycle time is 39.5 minutes and the loader cycle time is 5.5 minutes?

   Hint

   Use the formula: Truck Cycle Time / Loader Cycle Time.

2. 2.

   How would you calculate productivity if you have 6 trucks, each with a productivity of 12.53 cubic meters per hour?

   Hint

   Multiply the number of trucks by each truck's productivity.

3. 3.

   What determines the balance number of trucks?

   • Truck Cycle Time divided by Load Cycle Time
   • Loader Speed multiplied by Number of Trucks
   • Cost of Truck Operations

   Hint

   Think about the formula for balance number.

4. 4.

   True or False: Increasing the number of trucks beyond the balance number decreases the total productivity.

   • True
   • False

   Hint

   Recall the limitations of loaders when too many trucks are present.

5. 5.

   Calculate the total unit production cost when using the balance number of trucks, including the impact of excessive truck costs beyond this number.

   Hint

   Use the unit cost formula and consider the effect of productivity limits.

6. 6.

   Design a scenario where the loader's downtime affects the balance point; suggest solutions to manage this downtime in truck operations.

   Hint

   Reflect on how to integrate maintenance schedules into operational timelines.