The　global　fragmentation　of　supply　networks　results　from　outsourcing　and　offshoring　strategies.　Supply　networks　outsource　segments　to　specialized　suppliers,　thereby　leveraging　their　enhanced　adaptability　and　reduced　costs.　These　practices　have　produced　intricate　interdependence　patterns,　facilitating　the　spread　of　disruption　risk.　Although　risk　management　provides　extensive　toolsets　for　addressing　critical　risks　at　the　dyadic　level,　there　has　been　a　lack　of　emphasis　on　evaluating　the　efficacy　of　these　tools　in　the　context　of　complex　global　supply　net-works.　Research　generally　concentrates　on　the　topological　properties　of　global　supply　networks　while　largely　ignoring　the　underlying　risk　propagation　process　in　identifying　critical　risks.　This　paper　develops　a　compre-hensive　view　of　the　supply　network　through　detailed　subtier　mapping　and　a　mathematical　formulation　that　overcomes　the　limitations　of　the　current　approaches.　The　proposed　formulation　model　incorporates　the　doing　business　environment　of　each　country　and　reproduces　the　spread　of　disruption　risks　under　three　disruption　risk　scenarios　in　global　supply　networks.　This　paper　illustrates　the　proposed　formulation　by　analyzing　the　critical　risks　of　global　flat　panel　display　supply　networks.　The　results　suggest　that　these　networks　are　robust　to　random　disruption　but　susceptible　to　target　disruptions.　Additionally,　disruptions　in　European　and　Asian　countries　have　detrimental　effects　on　the　overall　operation　of　supply　networks.