Match the statistical techniques used in HR forecasting $($in the left column$)$ with their shortcomings $($in the right column$).$

Trend analysis

Trend analysis drop zone empty.

Ratio analysis

Ratio analysis drop zone empty.

Regression analysis

Regression analysis drop zone empty.

It makes the implicit assumption that the pattern of staffing needs in the past will be predictive of the future but fails to take in to account any external factors.

It fails to directly account for any changes in technology or skill sets that might change the forecasts based on historical data.

Collecting enough data to make good estimates requires judgment calls and can be time$-$consuming.