Project velocity has slipped, and the team decided to skip testing to regain momentum and bring the project back on track. What must the project manager focus on as a result of this decision?

Skipping testing to regain momentum directly leads to increased technical debt. Technical debt represents the implied cost of additional rework caused by choosing an easy (limited) solution now instead of using a better approach that would take longer. In this case, the "easy" solution is skipping testing, which will likely result in defects and quality issues that must be addressed later, incurring additional time and cost. Increased burn rate and increased cost are potential consequences of increased technical debt, as fixing issues later is often more expensive. However, technical debt is the direct and immediate result of the decision to skip testing. Reduced efficiency might occur due to rework, but it's not the primary, direct outcome of skipping testing; rather, it's a potential symptom of the underlying technical debt.