Milestone Decision Review

A Milestone Decision Review is a formal Department of Defense acquisition gate at which the Milestone Decision Authority (MDA) evaluates whether a defense acquisition program has met the entry criteria for the next phase of the Defense Acquisition System and authorizes (or denies) the program to proceed.

What is a Milestone Decision Review?

The DoD acquisition system is structured around three primary milestones defined in DoDI 5000.02. Milestone A authorizes entry into the Technology Maturation and Risk Reduction (TMRR) phase after completion of the Analysis of Alternatives (AoA). Milestone B authorizes entry into the Engineering and Manufacturing Development (EMD) phase, this is the most significant milestone, as it typically represents formal program initiation and authorizes significant development contract awards. Milestone C authorizes entry into the Production and Deployment phase after successful system-level testing.

The MDA may be the USD(A&S), the DoD Component Acquisition Executive (CAE), or a program executive officer (PEO), depending on the program's acquisition category (ACAT). For ACAT I Major Defense Acquisition Programs (MDAPs), the USD(A&S) is the MDA. For smaller programs, the MDA may be delegated to the CAE or PEO level.

Each milestone requires completion of an Acquisition Decision Memorandum (ADM) that documents the MDA's decisions, approved program cost and schedule baselines (the Acquisition Program Baseline, or APB), statutory and regulatory requirements satisfied, and any conditions that must be met before the next milestone. Contractors supporting programs approaching Milestone B should be prepared for intensive government review of their technical maturity, cost estimates, and schedule risk.

Why milestone decision reviews matter for government contractors

Major defense programs do not proceed, and contractors do not receive award or option exercises, without MDA approval at each milestone. Understanding where a program stands in the milestone sequence is critical for contractors planning staffing, business development investments, and long-range revenue forecasts.

Example

A prime contractor is developing a new ground vehicle communications system under an ACAT II program. The program approaches Milestone C with system-level testing substantially complete. The MDA reviews the Operational Test and Evaluation (OT&E) results, cost performance data from the EVMS, and the Technology Readiness Assessment confirming TRL 8. The MDA issues the Acquisition Decision Memorandum approving entry into Low Rate Initial Production (LRIP), and the contracting officer awards the LRIP contract shortly thereafter.

Frequently Asked Questions

What is an Acquisition Decision Memorandum (ADM)?

The ADM is the formal output of a milestone decision review. It documents the MDA's decisions, approved program baselines, any waivers granted, and conditions placed on the program going forward. The ADM is the authoritative record of what was approved at each milestone.

Can a program skip milestones?

Under DoDI 5000.02, programs may enter the acquisition process at any point based on the maturity of the technology and the acquisition strategy. Programs using rapid acquisition pathways, Middle Tier Acquisition (MTA), or Other Transaction Authorities (OTA) may bypass traditional milestone sequencing entirely.

How does Milestone B differ from Milestone A?

Milestone A is the earlier gate, authorizing the TMRR phase focused on technology maturation and source selection for development contracts. Milestone B is the more consequential gate, it formally initiates the program, establishes the Acquisition Program Baseline, and typically leads to award of the primary development contract. Milestone B is where the largest financial commitments are made.

What happens if a program fails a milestone review?

A program that does not meet milestone entry criteria may be held in its current phase pending additional work, restructured with a reduced scope or revised schedule, or in extreme cases terminated. The MDA may also grant a conditional approval with specific conditions that must be met within a defined period.