The following is the January Government Accountability Office report, Columbia-class Program Lacks Essential Schedule Insight amid Continuing Construction Challenges.
From the report
What GAO Found
The Navy plans to deliver the first, or lead, Columbia class submarine—the largest and most complex submarine in its history—more quickly than it did for the lead submarines of prior classes, such as the Virginia class program. But the shipbuilder has not conducted a schedule risk analysis of the lead...
https://news.usni.org/2023/01/25/gao-report-on-columbia-class-submarine-program