grey problem
白黒はっきりしない難問
ITIL v3 problem management
ITIL v3 incident management
COBIT（Control Objectives for Information and related Technology）
RPR problem diagnosis
ケプナー・トリゴー（KT : Kepner-Tregoe）
/suto3/google.icongrey problem
image grey problem
define grey problem
wikipedia grey problem
weblio grey problem
kotobank grey problem
jisho grey problem