Why You Include Drop Ship Demands and Supplies in Supply Chain Planning
When you select the Include drop ship demands and supplies option in the Supply: Advanced Options dialog box, all drop ship demands and supplies for planned source systems are included in the planning process.
Supply chain planning supports only one source system per plan. Item-organization attributes for the drop ship validation organization are included by the snapshot. Drop ship validation organization is defined in the Organization tab of manage supply network. If you don't select this option, the planning process removes drop ship demands and supplies from the plan.