In How to Hire and Develop Your Next Top Performer: The Five Qualities That Make Salespeople Great, Herbert Greenberg found that 55% of salespeople don't have the skills to be successful.
ໃນ ວິທີທີ່ຈະຈ້າງແລະພັດທະນານັກສະແດງທີ່ຫນ້າຕໍ່ໄປຂອງທ່ານ: ຫ້າຄຸນສົມບັດທີ່ເຮັດໃຫ້ຜູ້ຂາຍດີ , Herbert Greenberg ພົບວ່າ 55% ຂອງຜູ້ຂາຍບໍ່ມີທັກສະທີ່ຈະປະສົບຜົນສໍາເລັດ.