You are managing an engineering team responsible for a connected-service platform used by field technicians and service operations. Over the last 2 quarters, leadership has invested in better planning, code review standards, automated testing, and incident response, and your team feels more effective, but stakeholders are asking for evidence that the team is actually improving over time. In the same period, average sprint throughput rose from 38 to 46 story points, Sev-1 incidents fell from 6 to 3 per quarter, and median cycle time moved from 9.5 days to 7.0 days, while roadmap commitments increased by 15%.
How would you define and measure whether the team is truly improving over time, and how would you distinguish real improvement from metric gaming or temporary changes in workload mix?