15.7 Reproducible software demonstrations

The NVRW package provides the same analytical ideas in several forms:

• nvrw_import_validate.R imports the raw files and performs explicit quality checks;
• nvrw_eda.R produces monthly visit and retention summaries;
• nvrw_analysis.R demonstrates retention modelling, utilization projections, and CLV outputs;
• NVRW_Analysis_Examples.xlsx provides inspectable tables and native Excel charts; and
• NVRW_Power_BI_Guide.md specifies the data model and DAX measures for a Power BI report.

The Excel demonstration separates source tables from summarized decision information and uses native charts that remain editable.

Screenshots communicate the intended appearance and reading order. Reproducible files allow readers to inspect formulas, relationships, code, and assumptions. Both are needed because appearance alone cannot establish analytical correctness.