In defining what constitutes reliability as it applies to the responsiveness of logistics functions, Joint Publication 4.0 on Joint Logistics states:

Reliability is reflected in the dependability of the global providers and the development of a resilient distribution network able to deliver required support when promised. Reliability is characterized by a high degree of predictability, or time-definite delivery of support. Time-definite delivery is the consistent delivery of requested logistics support at a time and destination specified by the requiring activity.

To that end, the DoD supply chain stakeholders and customers have established time-definite delivery (TDD) standards for the wholesale supply and distribution system. These standards apply to delivery of materiel to requisitioning customers within the Department of Defense.  The standards are presented in two formats.

The first format presents standards as negotiated by the U.S. Transportation Command (TRANSCOM) with distribution stakeholders from the service providers’ perspective and approved by the Distribution Steering Group. These standards are negotiated between distribution providers, suppliers, and Combatant Commands and used to measure the performance of providers in moving materiel from storage sites to customer locations based on transportation mode and priority.  To review these standards select FY19 Distribution Steering Group Approved Time Definite Delivery Standards.

The second format presents standards, as translated by the Office of the DASD for Supply Chain Integration, to be used in accordance with the Uniform Materiel Movement and Issue Priority System (UMMIPS). UMMIPS is customer focused and seeks to meet customer delivery requirements based on the military importance of the customer and the urgency of the customer’s need. Military importance is reflected in the Force/Activity Designator (FAD) assigned to each unit. The unit’s FAD and urgency of need designators (UND) are combined and reflected in requisitions as Issue Priority Designators (IPDs). Using the IPD and required delivery dates that customers assign to requisitions, UMMIPS determines the appropriate TDD standard to apply. The standards are used to measure the reliability of the DoD supply chain from the customer’s viewpoint. This version of the standards is translated to address the requisitioner’s or customer’s expectations. To review those standards select OSD UMMIPS Time Definite Delivery Standards.

Although the two formats may look different, the UMMIPS TDD standards are derived from the negotiated TDD standards. When the customer requires fast movement, the UMMIPS standard is based on a fast mode negotiated standard. When the customer requires routine movement, the UMMIPS standard is based on a negotiated standard with a slower mode.

By tracking actual performance against the TDD standards assigned to distribution providers as well as actual performance against the TDD standards per IPD that the customers specify, the Department’s objective is to ensure reliable delivery of materiel in terms that customers understand. Using the second version of the TDD Standards enables customers to understand the most optimistic, most likely and most pessimistic cases for delivery of materiel based on the IPD that he or she entered in the requisition when submitted.

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