Define the term "missile inventory".

The term "missile inventory" refers to the total stock of missile systems available for deployment. This definition encompasses not only the missiles that are currently stored and available but also those that are ready for operational use. An effective inventory provides a comprehensive overview of all missile assets a military force has on hand, their readiness status, and their deployment capabilities.

The other choices do not capture the complete scope of what a missile inventory entails. For instance, simply focusing on the quantity of missiles in storage fails to consider missiles that may be in operational roles or not physically stored. Similarly, the success of missile testing is only one aspect of missile management and does not define the total inventory of available systems. Lastly, a database containing specifications adds to the understanding of missile systems but does not represent the physical stock or readiness of missiles, which is crucial for operational planning and execution. Therefore, the definition encapsulated in the chosen answer is the most accurate representation of a missile inventory.