Moderating effects of Turnover in Software Teams

Abstract

This study analyzed 685 external turnover events across 459 software development teams that occurred between 2020 and 2025 to examine how team size and temporal distribution moderate productivity recovery. Factorial ANOVA with Benjamini-Hochberg FDR correction tested three hypotheses regarding team configuration effects on recovery measured against departing engineer and team baseline productivity. An algorithm to quantify temporal distribution of a team was developed and documented. Team size and temporal distribution showed weak independent effects (66.7-83.3% robustness, η² ≈ 0.003-0.004), but their interaction demonstrated 100% temporal robustness across all six recovery months studied (η² ≈ 0.013). Small teams (3-4 members) achieved 131.4% recovery when temporally concentrated versus 106.4% when distributed, while large teams (8-10 members) showed the inverse: 129.3% recovery when distributed versus 98.6% when concentrated. The 8-member threshold represents a qualitative shift where coordination benefits transition from synchronous (smaller teams) to asynchronous mechanisms (larger teams). These findings translate to 5.5 hours per developer monthly, providing quantifiable guidance for team formation and turnover management in distributed software organizations.