firmware product requirement definition process design change management business model technical documentation scheduling three-phase vendor management workplace safety teamwork milestones compilers collaboration risk mitigation context switch integration amortization schedule communications problem management business process comprehensive planning team management ad tracking modbus c automation application dependency agile project management customer analysis data acquisition project risk management electronics conflict management program management access control functional requirement mitigation accounting zigbee research and development autosar system control track geometry project planning software testing linux verification and validation market research project management application development coordinating color profile research management mqtt prioritization planning software product quality differential phase