What are two criticisms of the unemployment rate how do these criticisms relate to overstating?

The two criticism of unemployment rate are the following;

- Part time workers are counted as employed

- Discouraged workers are not included in the labor force

These criticism relate to the overstating or understanding of unemployment rate because part time workers counted as employed will understate the actual employment whereas the discourage workers that does not belong to the labor force will likely understate the actual employment.