At least one embodiment is directed to a system for measuring parameters of a skeletal system in positions of optimal alignment for implantation of an orthopedic device. The system comprises one or more position sensors (202, 204, 206, 208, 210, and 212), one or more measurement sensors (606), a processing unit (506), and a screen (502). The position and measurement sensors are in communication with the processing unit. Position and relational positioning information in conjunction with one or more parameter measurements is used to determine proper seating of an implant, device balance over a range of motion, and device stability. For example, measurement of loading over a range of motion can be used to determine the amount and type of adjustment required for an implant. The positional and measurement data is stored in a database and accessible to the processing unit (506) to aid the surgeon, hospital, and implant manufacturer.