2.2. Factors Affecting Unit Cost

Try these first

1. 1.

   What does job efficiency measure?

   Hint

   Think about the time a machine is used compared to the time it's available.

2. 2.

   What is a correction factor?

   Hint

   Recall how we adjust calculations to match conditions.

3. 3.

   What is the purpose of a correction factor?

   • To increase productivity
   • To adjust productivity estimates
   • To decrease costs

   Hint

   Think of the purpose of corrections in math.

4. 4.

   True or False: All machines operate at maximum efficiency under all conditions.

   • True
   • False

   Hint

   Consider real-world challenges that machines face.

5. 5.

   If a bulldozer’s cost per hour is $1200 and its adjusted productivity after applying various factors is 30 bank meters/hour, what is the total cost for moving 150 bank meters?

   Hint

   Use unit cost calculations to find the total.

6. 6.

   During a project, the soil density changes to require a higher correction factor than previously planned. If the original unit cost was $25, and your new factor raises costs due to reduced productivity, estimate the new cost assuming a 15% increase.

   Hint

   Calculate the increase based on percentage change.