層別

暮らしに役立つQC七つ道具（1） ――層別：「分ける」ことは「分かる」こと

層別

strat·i·fi·ca·tion (străt'ə-fĭ-kā'shən)
n.

1. 1. Formation or deposition of layers, as of rock or sediments.
   2. The condition of being stratified.
2. A layered configuration.