scope:

a. This instruction describes the application of Readiness Based Sparing (RBS) methododology to ensure that readiness thresholds and objectives as specified by CNO are achieved at the least cost. Readiness thresholds are expressed as either Operational Availability (A_o) or Full Mission Capable (FMC) rates for RBS implementation. The term "RBS" applies to single echelon and single indenture systems and their multi-echelon (ME) and multi-indenture (MI) extensions. RBS applies to both traditional organic [Navy/Department of Defense (DoD)] and non-traditional Contractor Logistic Support (CLS) practices.

b. This RBS method is to be utilized for all new acquisition programs and equipment modification programs in Acquisition Categories (ACATs) I, II, or III, with the exception of nuclear and SSBN programs. It should be applied, as appropriate, to existing weapon systems and other new systems (i.e., ACAT IV) when it provides an optimal method for attaining the required readiness objective. RBS is to be applied to allowance package development, including CV and L-Class Aviation Coordinated Allowance Lists (AVCALs), Shore-Based Coordinated Allowance Lists (SHORCALs), Marine Aviation Logistics Support Packages (MALSPs), and Coordinated Shipboard Allowance Lists (COSALs).

c. New acquisition programs (ACATs I, II, & III) in the Engineering and Manufacturing Development phase or at the end of the Program Definition and Risk Reduction phase will apply the RBS process. This includes programs that require tailored Interim Supply Support (ISS) assistance to achieve full logistic support capability. The RBS assessment and sparing processes must be completed in time to allow for sufficient administrative and production lead-time before the Material Support Date (MSD). However, RBS is an ongoing process and should be revisited as necessary over the life of the weapon system or other acquisition program.

d. RBS will selectively apply to commercial best practices like Direct Vendor Delivery (DVD) or Time Definite Delivery (TDD) (i.e., use of premium transportation). RBS will also be applied, as appropriate, in the procurement and support of Commercial and Non Developmental Items (CaNDI) spares, subsystems, or systems, and in support of alternative approaches such as pre-positioned spares.

e. RBS is critical in the life cycle of any system requiring supply support and plays an important role in the provisioning for initial support as well as an equally important and ongoing role in subsequent replenishment support. Readiness and performance metrics, such as A_o and customer wait time, help indicate how well the system's integrated logistics support (ILS) is fulfilling its purpose during the Production & Fielding/Deployment and Operational Support phases. Over the system's life cycle, supply support effectiveness and its affect on A_o, and customer wait time is, in large measure, dependent upon a robust RBS effort.