### Question
What is the definition of milestone I decision?


### Answer
The definition of **milestone I decision** is as follows in *10 U.S.C. § 2364*:

> the decision by an appropriate official of the Department of Defense selecting a new major weapon system concept and a program for demonstration and validation of such concept

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

