How many days prior to the expiration date should type II shelf-life items be scheduled for serviceability testing?

Type II shelf-life items are those that have a defined storage life and require periodic inspection or tests to ensure they are still serviceable before their expiration date. Scheduling serviceability testing between 15 to 45 days prior to the expiration date allows for proper assessment while ensuring that there is enough time to take corrective actions if the items are found to be unserviceable. This timeframe strikes a balance between being proactive about inventory management and minimizing waste due to potential expiration of items that have not been tested.

The other options suggest either too soon or too far in advance of the expiration date for testing to be practical or efficient. Testing too many days before expiration may not yield a useful indicator of the item's condition when it actually comes time to use it, while testing too close could result in insufficient time to respond to any issues uncovered during the testing process. The chosen timeframe of 15 to 45 days supports effective inventory control and readiness.