PC BS
Positive Discrimination is .. discrimination, period.
The fools who complain about the proportion of a particular sex in a field should read the book "The Red Queen" and learn that people, employees included, do what serves their best interests (including instinctive survival-of-the-species ones), and what they are good at, not Feminist self-deception and wishful thinking.
The sexes are not the same, each have their own strengths and weakness; this mix of abilities is not uniform across all members of each sex, and plenty of them can't be changed significantly by education or experience.
Yes, managers should be open to the women who want to and can do this kind of work, however this needs to be on a best person for the job basis, not discriminating quotas.