### Question
Can you define what Milestone B approval means?


### Answer
**Milestone B approval** is defined as the following in *10 U.S.C. § 4172*:

> a decision to enter into system development and demonstration pursuant to guidance prescribed by the Secretary of Defense for the management of Department of Defense acquisition programs

#### Citation:
  - *10 U.S.C. § 4172*
  - Heading: **Subtitle A-General Military Law > PART V-ACQUISITION > Subpart E-Research and Engineering > CHAPTER 309-TEST AND EVALUATION**

