Engineering　test　of　electromechanical　products　is　an　important　part　of　product　quality　management　and　an　important　means　to　improve　product　quality　and　reliability.　Engineering　testing　models　are　usually　used　to　programme　engineering　tests　and　generate　engineering　test　curves.　The　two　most　commonly　used　engineering　test　models　are　PM2　model　(Planning　Model　Based　on　Projection　Methodology)　and　CE　model　(an　extended　planning　model　of　Crow).　By　analyzing　the　sensitivity　of　the　parameters　of　the　two　models,　the　results　show　that　these　two　models　can　not　accurately　describe　engineering　tests　sometimes,　because　of　the　defects　of　the　models　themselves.　Therefore,　this　paper　presents　an　equation　to　express　the　required　engineering　test　time　by　fix　effectiveness　factor　and　management　strategy.　Furthermore,　a　new　engineering　planning　model　based　on　the　equation　is　proposed.　Based　on　the　case　study,　the　proposed　engineering　planning　curve　matched　well　with　the　actual　phased　growth　curves,　which　shows　the　proposed　engineering　testing　planning　model　is　reasonable　and　credible.　©　2019　IEEE.