Contents > 4 The SDMetrics User Interface > 4.9 The View 'Design Comparison' > 4.9.3 Comparative Descriptive Statistics Table

### 4.9.3 Comparative Descriptive Statistics Table

This tab sheet shows a side by side comparison of the descriptive statistics for both designs. The table shows the metrics by row. Figure 15: Comparing descriptive statistics

The meaning of the first four columns is as follows:

• PosDeltas: the sum of all positive metric deltas for the metric.
This indicates how much the metric values increased by adding new elements or modifying existing ones.
• NegDeltas: the sum of all negative metric deltas for the metric.
This indicates how much the metric values decreased by deleting elements from the design, or modifying existing ones.
• PosD_na: the sum of all positive metric deltas for the metric, excluding added elements.
This indicates how much the metric values have increased by modifying existing design elements.
• NegD_nd: the sum of all negative metric deltas for the metric, excluding deleted elements.
This indicates how much the metric values have decreased by modifying existing design elements.
The remainder of the columns in the table shows the descriptive statistics including sum, mean, and percentiles for the first design, second design, and the difference for each descriptive statistic.