It is not really about physical strength here . If you're saying the level of work they put , that means the ability to organise and coordinate an effective and smooth running of the organisation to ensure that customer satisfaction are properly met.I think when it comes to the issue of productivity among males and females,it does not have to be on the basis of who performs better.because when it come to the issue of productivity it is based on individual and the level of work they put into their job.