What coordination challenges arise in a group (Konzern) insolvency, and how are they addressed?

When several companies in a group become insolvent, each legal entity in principle has its own separate estate, creditors, and (potentially) its own administrator and court — yet the businesses are operationally entangled through intercompany trading, shared services, cross-guarantees, and cash pooling. The challenges: separate estates can pull in different directions, intercompany claims and guarantees create conflicts between estates, value is destroyed if integrated operations are dismembered, and multiple administrators/courts (especially cross-border) duplicate cost and risk inconsistent outcomes. These are addressed by coordination mechanisms: Germany's group-insolvency rules (Konzerninsolvenzrecht) allow a coordinating court/proceeding and a coordination plan, the EU Insolvency Regulation provides group coordination proceedings, and in practice appointing the same administrator across entities, protocols between courts, and joint sale processes preserve going-concern value. The aim is to coordinate without consolidating the estates substantively — respecting each entity's separate creditors while maximizing overall value.