• Contract requirements and customer notification. The customer needs to be notified that an SPL exists.This notification can be accomplished by response to the solicitation or by submission of the company's parts management plan that describes its SPL procedures.
• Depleting existing parts stock. When an existing part is superseded, the determination must be made whether to deplete or to purge the existing inventory (deplete old and use
new-versus purge old and use new). Remember that when a part is replaced by a super- seding part, if the superseded (old) part is being eliminated to meet a standardization requirement or for standardization purposes, existing stock is depleted before going to the superseding (new) part.
Counterfeit Parts
Effective parts management requires implementation of measures to prevent incorporation in military equipment of counterfeit items that can affect functional, cost, and schedule perform- ance. The increasing reliance on commercial items makes military systems more vulnerable to the growing amount of counterfeit items in the global supply chain, but counterfeiting can
even occur with items unique to military applications. Some notable commodity classes recent- ly experiencing growth in counterfeit risk include microcircuits and semiconductors. Common counterfeiting practices include re-marking parts to indicate different temperature performance levels (e.g., changing marking from commercial temperature range to industrial temperature range), functional performance level (e.g., changing speed grade on a microprocessor), and interconnect finish (e.g., changing marking code from pure tin to tin-lead finish indicator).
Industry working groups and standards, such as SAE International's AS5553 and AS6174, have identified best practices for preventing procurement of counterfeit items that parts man- agement plans should incorporate within their processes and procedures. The most important practice includes establishment of procurement procedures that allow purchase of items only from the original manufacturer or the original manufacturer's franchised distributors. Procure- ment of items from other sources must address the counterfeit risk through documented proce- dures of thorough documentation analysis and test of the items. In addition, it is critical that parts management plans require industry notification of suspect and confirmed counterfeit
items and sources through systems such as GIDEP, as well as procedures that prevent reintro- duction of suspect and confirmed counterfeit items back into the supply chain. The entire sup- ply chain must become aware of the counterfeit risk and work in concert to prevent introduction of counterfeit items into military equipment.
Lead-Free Electronic Parts
Military systems have long depended on tin-lead alloy solders to meet system requirements, and the military design, qualification, reliability, and support infrastructure reflects the use of these alloys. Lead-free solder alloys have very different material properties than tin-lead alloys
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