What is the correct order of steps in the change control process?

$1.$

Request, approval, impact assessment, build$/$test$,$ monitor, implement

$2.$

Request, impact assessment, approval, build$/$test$,$ implement, monitor

$3.$

Request, approval, impact assessment, build$/$test$,$ implement, monitor

$4.$

Request, impact assessment, approval, build$/$test$,$ monitor, implement