形容詞 top-down:

1. of an approach to a problem that begins at the highest conceptual level and works down to the details

top-down

adj.（形容詞）
Of or relating to a hierarchical structure or process that progresses from a large, basic unit to smaller, detailed subunits:
自頂向下的，由高至低的：等級式的結(jié)構(gòu)或步驟的或與其相關(guān)的，由大的基本單位至較小的具體次單位：
例句：
a top-down description of the department`s function.
以自頂向下的方式描述部門的功能

Commanded by or originating from ones having the highest rank.
高階命令的：由最高階層操控的，來源于最高階層的