01固定價格合約複雜開發專案成本上升可能導致不利合約調整。U.S. Securities and Exchange Commission: Northrop Grumman Corporation SEC filings and company facts
02預算時點風險撥款延遲及國防重點變化可能延遲訂單和交付。U.S. Securities and Exchange Commission: Northrop Grumman Corporation SEC filings and company facts
03供應約束專業勞動力及零件短缺可能擾亂生產計劃。U.S. Securities and Exchange Commission: Northrop Grumman Corporation SEC filings and company facts