I think you can get good idea using below link. https://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst3650/software/release/3e/qos/configuration_guide/b_qos_3e_3650_cg/b_qos_3se_3650_cg_chapter_0100.pdf
I think you can get good idea using below link. https://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst3650/software/release/3e/qos/configuration_guide/b_qos_3e_3650_cg/b_qos_3se_3650_cg_chapter_0100.pdf