The GNWT plans to upgrade its HR/payroll application from Peoplesoft version 8.9 to 9.1 between December 2011 and September 2012 due to the end of support for 8.9 in June 2011. The upgrade will provide access to new functionalities, reduce customizations, and ensure compliance with legislative changes while avoiding potential higher costs associated with future upgrades. The project scope includes enhancements to employee self-service, workflow optimizations, and improved reporting for decision makers.