### Question
What does milestone O decision mean?


### Answer
**Milestone O decision** has the following meaning in *10 U.S.C. § 2364*:

> the decision made within the Department of Defense that there is a mission need for a new major weapon system and that research and development is to begin to meet such need

#### Citation:
  - *10 U.S.C. § 2364*
  - Heading: **Subtitle A-General Military Law     > PART IV-SERVICE, SUPPLY, AND PROCUREMENT   > CHAPTER 139-RESEARCH AND DEVELOPMENT**

