===== How does the TPFDD work? =====

  *  JAS moves units (BSEs) in one or more shipments (RLNs, or Requirement Line Numbers)
  *  Each RLN has a list of assets with a quantity, an origin, a destination and initiating/triggering event (FDO), transport mode, and a required delivery date based on the FDO or initiating event.
  *  In JAS, users may aggregate and/or surrogate assets that higher fidelity, mobility models may explicitly track, e.g., tentage, trailers, miscellaneous unit equipment, etc.  Typically, JAS is only interested in major end items and sustainment items.
  *  Assets belonging to a unit but not listed in the JTPFDD are considered as IN PLACE in JAS.
  *  If any asset appears in a unit RLN, the IN PLACE quantity is set to zero, pending receipt of deliveries.
  *  Units activate (can execute orders, etc.) upon the arrival of a user-specified percentage of its critical assets.  Users can set a global default value, or a value for a BSEType, or a value for a specific BSE, or any combination.
  *  Assets delivered to POD prior to a unit's activation may be attrited.  Attrition can affect the unit's ultimate activation (or failure)
  *  JAS has two execution modes of interest: atDestination and atPOE.
    *  **atDestination** - assets arrive (virtually, i.e., no explicit transporters) per the JTPFDD, assumes perfect execution
      *  **atPOE** - JTPFDD flows from origin (Port of Embarkation) to destination based on transport availability, loading, and subject to attrition and POD closure
    *  Transportation from a POD to another installation or staging area is accomplished using IntraTheater lift or organic resources.