What key performance indicator (KPI) most directly reveals the decay of tacit knowledge within a stagnant team?

The KPI that most directly reveals the decay of tacit knowledge within a stagnant team is the 'First-Time Resolution Rate' (FTRR) for non-routine tasks. Tacit knowledge refers to the skills, experience, and know-how that are difficult to document or transfer formally; it's the 'unwritten rules' and expert intuition that allows employees to solve problems efficiently. When a team is stagnant, its members are not actively learning, sharing, or refining this tacit knowledge. Consequently, their ability to quickly and effectively resolve novel or unusual problems diminishes. The FTRR measures the percentage of non-routine issues that are resolved correctly on the first attempt, without escalation or further intervention. A declining FTRR indicates that the team's collective problem-solving ability related to complex or less-documented tasks is deteriorating, directly signaling the loss of valuable tacit knowledge. For example, if a customer service team used to resolve 80% of unique customer complaints on the first call, but this rate drops to 60% over time, it suggests that the team's accumulated understanding and expertise in handling unusual issues is eroding. This KPI contrasts with those that measure explicit knowledge, which can be documented and readily accessed; FTRR focuses specifically on the application of learned experience and intuition, highlighting the impact of stagnation on the team's ability to handle unpredictable situations.