A. Understanding the difference between shelf-life and service life is critical to the proper management of all shelf-life items.
Shelf-Life: Any item in the Shelf-life Extension System (SLES) with a shelf-life code other than zero is designated as a shelf-life item. Shelf-life items include any National Stock Number (NSN) that is catalogued as a Type I (non-extendable) or Type II (extendable) National Stock Number (NSN) in the Federal Logistics Information System (FLIS). All shelf-life items are managed by manufacturers contract or lot number based on the item’s date of manufacture, date packed (subsistence only), assembly date, or cure date.
Type I non-extendable items have a finite period of shelf-life or point in time that they reach their date of expiration (date they must be processed for disposal). Type II shelf-life items may be tested and extended. All shelf-life Items are stored IAW storage standards contained in the Materiel Quality Control Storage Standards (MQCSS) and all storage activities will manage/maintain the serviceability of assets IAW Care of Supplies in Storage (COSIS) requirements. Inventory Control Points (ICP) may publish supply bulletins that provide additional, commodity specific guidance to storage activities and end item users as applicable.
Service Life: An item is considered to be service life the moment a properly stored Type I or Type II shelf-life item is
:
- Issued to a customer and removed from its original method of preservation protective packaging.
- Introduced to mission requirements.
- Installed into its intended application.
- Left in storage indefinitely as bench stock.
Under any of these conditions, the item’s management period and shelf-life date ends and service life begins. These items are not eligible for shelf-life extension testing and will be managed IAW applicable Technical Manuals (TMs) or IAW guidance provided by the materiel owner Services. If the TM does not specify service life of an item, contact the item’s source of supply, or your Service’s shelf-life administrator.