Repro:

1. Goto Rapidboard for project (which has at least two Resolved issues).
2. Open Control Chart (Report tab).

Expected:

• A. Chart should show horizontal line using Geometric Mean.
• B. Summary footer data should show Geometric Mean & Geometric Standard Deviation.

Actual:

• A. Chart shows horizontal line using Arithmetic Mean.
• B. Summary footer data shows Mean (Arithmetic) & Standard Deviation (Arithmetic).

Justification:

• Cycle/Lead time is reasonably modelled with Lognormal distribution (or others), not likely Normal (as also evidenced by the existing logarithmic scale on the Control Chart's vertical axis).
• The Lognormal moments are the Geometric Mean & Geometric Standard Deviation.