Subcontractor shall carry out the Work with due diligence according to good practice and standards of workmanship for the kind of Workmanship for kind of Work in question in order to meet the Milestones or key dates detailed in the Schedule. If the Progress is behind Schedule due to delays attributable to Subcontractor including, but not limited to, low productivity, default and/or negligence, Subcontractor shall immediately take such steps as Contractor considers necessary to expedite the rate of progress of Work including, but not limited to, working overtime and mobilizing additional manpower and resources in order to meet Schedule, at no additional cost to Contractor.