Helen P. Markham

Helen P. Markham is the editorial pen name used for guides and calculator explanations on Quality Metrics Explained. The editorial approach is to define the metric, show the arithmetic, identify assumptions, and point readers toward authoritative or professional sources where a general website should stop.

Editorial focus

Articles are reviewed for internal consistency, formulas are tested with sample values, and safety or regulatory boundaries are added where a simplified model could be mistaken for professional guidance.

Corrections

Factual corrections can be submitted through the limited-purpose contact route. We do not offer one-to-one consulting under the pen name.