3 ms·

Machine year is similar to man hours. It's the total number of accumulated years the machines were in use.

• garysvpa 12y ago
  I completely agree!
• joss82 12y ago
  Exactly, so 100 machine years could be 200 machines running for 6 months, or 10 machines running for 10 years, or 1 machine running for 100 years ;). Well, you get the idea.