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 (USTRANSCOM) with distribution stakeholders from the service providers’ perspective and approved by the Distribution Steering Group. These standards are coordinated between distribution providers, suppliers, and Combatant Commands and used to measure the performance of the distribution network in shipping materiel from storage sites to customer locations based on supplier location, transportation mode and consignee location (country). To review these standards select FY20 Distribution Steering Group Approved Time Definite Delivery Standards.

The second format presents goals (described as Operational Need Goals) agreed upon between USTRANSCOM, Military Services, and Combatant Commands and translated by the Office of the DASD for Logistics, 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 transportation priority to apply. The goals 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 warfighter's or customer's expectations.  To review those standards select UMMIPS Operational Need Goals.

Operational Need Goals (ONG) are derived from the agreement between USTRANSCOM and each Service. ONG assesses how quickly shipments move depending upon the transportation priority that was assigned by the Services.

By assessing actual performance against the TDD standards assigned to distribution providers as well as actual performance against ONG that the customers specify, the Department monitors the effectiveness of distribution and reliability of material in terms that the distribution provider requires and customers understand.

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