June 28, 2022


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Weapon Systems Annual Assessment: Challenges to Fielding Capabilities Faster Persist

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What GAO Found

For over 20 years, GAO has assessed the Department of Defense’s (DOD) weapon programs and noted significant changes in its acquisition policies and practices. GAO’s first assessment in 2003 highlighted challenges, such as committing billions of taxpayer dollars before obtaining key information, including reliable cost estimates and proven designs. Yet these challenges still hinder many programs. And they slow the department’s current emphasis on delivering capabilities to the warfighter faster.

This year’s report analyzed 63 of DOD’s costliest weapon system acquisition programs. These programs include:

  • 40 major defense acquisition programs (MDAP);
  • four future major weapon acquisitions; and
  • 19 programs using the middle tier of acquisition (MTA) pathway, used for rapid prototyping and rapid fielding efforts.

GAO found that MDAPs continue to struggle with schedule delays. Over half of the 29 MDAPs that GAO reviewed that had yet to deliver capability reported delays during the past year (see figure). The lack of future year funding data in the fiscal year 2022 budget request precluded GAO from assessing the MDAP portfolio’s cost performance this year.

Over Half of MDAPs Reported a Delay to Capability Delivery since GAO’s Prior Assessment

Over Half of MDAPs Reported a Delay to Capability Delivery since GAO's Prior Assessment

a Five programs reported delays but stated the total delay was unknown at the time of GAO’s review.

MDAPs and MTA Programs Continue to Proceed with Limited Knowledge, Signaling Potential Risks

GAO observed a correlation between programs that obtained certain knowledge at key points and better cost and schedule outcomes. Knowledge-based acquisitions attain crucial information about topics such as technology maturity before proceeding beyond key points. But the majority of MDAPs GAO reviewed continue to not fully achieve knowledge that informs key investment decisions. This finding is consistent with GAO’s reporting over the last 20 years.

DOD continues to leverage MTA rapid prototyping and rapid fielding efforts, with the aim of delivering capabilities faster. MTA programs do not have comparable milestones to facilitate consistent schedule analysis. However, three MTA programs GAO reviewed reported challenges that may threaten the planned program completion dates. These challenges may also hinder the programs’ ability to rapidly deliver capabilities as initially envisioned.

Further, MTA programs’ approaches to obtaining knowledge pose potential risks. DOD is increasing its use of the MTA pathway. Yet, GAO observed that these programs generally do not plan to attain sufficient product knowledge before starting follow-on efforts, falling short of leading acquisition practices. This approach increases the risk that these follow-on efforts may encounter cost, schedule, or technical challenges during development or production.

Limited Adoption of Modern Software Practices by Weapon Programs Persists

Additionally, GAO’s past work has emphasized the importance of modernizing DOD’s software development efforts. The department built on ongoing modernization initiatives over the past year. For example, DOD leadership has emphasized key practices, such as iterative development. However, most of the 39 programs that reported using a modern software development approach deliver working software for user feedback more slowly than recommended by industry’s Agile practices, which call for rapid, frequent delivery of software and fast feedback cycles (see figure). As a result, these programs may lose out on some of the benefits of using a modern approach.

Software Delivery Time Frames for Programs That Reported Using Modern Development Approaches (in months)

Over Half of MDAPs Reported a Delay to Capability Delivery since GAO's Prior Assessment

GAO’s past work has also found that cybersecurity for weapon systems is a critical area that DOD must improve. However, GAO continued to find programs not fully implementing recommended cybersecurity practices, such as testing.

Insight into Industrial Base Challenges May Be Hindered by Limited Risk Assessments

GAO assessed risks that DOD’s costliest weapon programs reported related to the defense industrial base. Over half of the 59 programs GAO reviewed reported tracking industrial base risks. However, nearly half of the programs tracking industrial base risks reported that they did not plan for an industrial base assessment—which GAO defined as an assessment of an industry where there is a known problem in certain areas related to DOD products—to be conducted specific to their program. GAO found that DOD instructions do not define certain key phrases associated with the circumstances under which programs should conduct industrial base assessments. DOD intends these assessments to help ensure that needed industrial capabilities meet current and future national security requirements and are available and affordable. As a result, DOD’s insight into industrial base risks facing the department may be hindered.

Why GAO Did This Study

Congress included a provision in statute for GAO to review DOD’s weapon programs. This report, GAO’s 20th annual assessment, assesses the following aspects of DOD’s costliest weapon programs: their characteristics and performance, and their implementation of knowledge-based acquisition practices, modern software development approaches, and cybersecurity practices. The report also describes industrial base challenges reported by weapon programs and DOD’s efforts to assess these challenges.

GAO identified programs for review based on cost and acquisition status; reviewed relevant legislation and policy; collected program office data; and interviewed DOD officials.

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