Trend Decomposition

Separate time series into trend, seasonality, and residual components.

• Is attrition rising beyond seasonal patterns?
• Do hiring spikes follow predictable seasonality?

• Clean employee event history
• Consistent definitions
• Adequate sample size

Decompose monthly metrics; analyze trend and seasonal indices.

Decompose monthly voluntary attrition to distinguish seasonal graduations from structural increases.

Residual spikes warrant investigation beyond normal seasonal variation.

Short history limits seasonality detection; structural breaks from reorganizations.