While rare, if a change is needed to an SSD during its lifecycle, the system builder will be notified via PCN (Product Change Notification) well in advance to provide ample time to qualify the new BOM. PCNs are a critical part of the product lifecycle management process as it helps to ensure ongoing system compatibility and helps avoid costly field service issues. Defined by JEDEC (Joint Electron Device Engineering Council), JESD46C is specification for Product or Process Change notification and states: A document sent to users describing product or process changes, the reasons for the change, and the projected impact of the change. The JEDEC organization establishes global standards for Microelectronics.