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)