https://projectresearch.co.kr/2015/02/24/%ea%b3%b5%ea%b0%9c%ec%84%b8%eb%af%b8%eb%82%98-hybrid-agile-%ed%8a%b9%ec%a7%91-kt-ipcc-pmo-%ec%a0%81%ec%9a%a9-%ec%82%ac%eb%a1%80/