shipboard aviation stocks are off-loaded to designated naval air stations for inventory management purposes. MSP material is stored in designated cabinets in mockup staging areas. The MSP cabinets will be positioned on the ship at the time of re-AVCAL. l Operational Support Inventory (OSI) is the quantity of prepositioned material required to support the planned aircraft program and maintenance mission of an operating site. The OSI is composed of “fixed allowance” for DLR and FLR as well as “fixed” operating level for consumables. . Order and Shipping Time (OST) is the interval between the time a stock point processes a stock replenishment requisition to a supplier and receipt of an NAVICP (supplier) in-stock item. The OST is currently fixed at 17 days. . Supplemental Aviation Spares Support (SASS) is commonly retimed to as a pack-up kit that is required to support detached aircraft operations. The SASS is composed of DLR and FLR items. Authorized SASS require \ments are considered additive to an operating site’s fixed allowance. . The Weapons System Planning Document (WSPD) is a policy and planning document produced by NAVAIR. The WSPD provides the guidance necessary for the acquisition and logistics support of naval aircraft. The WSPD provides the number of aircraft at each site, levels of maintenance capability, pack-up requirements, carrier schedules, rotational aircraft assignments, and approved flying hours. OSI REQUIREMENTS DETERMINATION The community approach is used in determining the OSI requirements. This process is used for both repairable and consumable items as described in the following paragraphs. Consumable Items In a community approach, consumable requirements are determined by using the Ship’s AVCAL Asset Demand Tape (SAVAST) from carriers that are supporting the same aircraft and equipment, including those undergoing re-AVCAL. This method is designed to maximize the range for irregular demand patterns. This method also minimizes the establishment of new items for the purpose of recording its number of demands. The community SAVAST process includes taking data from four recently deployed aircraft carriers and data characteristics off the SAVAST undergoing re-AVCAL and creating, a combined SAVAST. Items on the SAVAST that have positive average monthly demand (AMD) and are not applicable in NAVICP-Phil tiles are included in the preliminary products. Repairable Items A new technique has been implemented to determine the repairable fixed allowances for carriers/amphibious ships. Essential] y, the collective 3-M experience gained from recently deployed aircraft carriers is used as the basis to determine the baseline fixed allowance. In this manner the usage experience during deployment of all aircraft carriers is considered rather than that of a single carrier. Baseline fixed allowance is considered the standard aircraft carrier allowance and is incorporated into the preliminary AVCAL. Changes to the baseline fixed allowance formulate the basis of negotiations at the AQRC. Initial Outfitting The ARR columnar quantity is selected for AVCAL inclusion for weapons systems not previously supported. Applicable Constraints The attrition allowance quantities for items with identical ARR application on the previous and current AVCAL and reflect zero usage will be reduced to one. Protected aircraft and weapons systems are not subject to constraints. When requested by the type commander, additional exceptions to the constraint program maybe applied. Preliminary Requirement Stock levels developed from the mechanized requirements process are used as the point of departure in AVCAL negotiations. The established allowance or revisions during Readiness Improvement Program (RIP) reviews will be included into the preliminary AVCAL and be considered as NAVICP-Phil recommended quantities. Readiness Improvement Program (RIP) During the RIP, specifically selected aircraft/ systems are reviewed to identify logistics problems. As 4-20