Reading note / Comparisons
Check the match
before the difference.
A difference between two numbers is only useful when you understand what each number counts. Start with the definition, the period, and the group being described.
Use the same unit of meaning.
A count of completed requests is different from a count of people who submitted requests. One person may submit several. Before comparing totals, write a short definition for each measure and identify any rules about duplicates, exclusions, or incomplete records.
Percentages need the same care. Ask what is included in the denominator and whether that base changed. A higher percentage does not automatically mean a higher total, and a missing response is not necessarily a negative answer.
A practical reading check
| Check | Ask about both figures |
|---|---|
| Definition | What is counted, and what is left out? |
| Time | Do the dates cover equivalent periods? |
| Coverage | Are the groups and settings comparable? |
| Calculation | Was the same calculation used? |
Align the period and the setting.
Compare like periods where possible. A full calendar month and a partial month do not cover the same opportunity for activity. Seasonal changes, opening hours, and changes in the way information is collected may also affect the result.
In an illustrative equipment-lending example, one summary could include only weekday loans while another includes weekends. The figures might both be accurate, but a direct comparison would need that difference to be addressed or clearly disclosed.
Explain a comparison you cannot fully align.
Sometimes the available material cannot be made equivalent. Do not hide the mismatch through a neat chart. State which parts differ and how those differences affect the question you are trying to answer.
A comparison can still provide useful context without supporting a precise ranking. Keep the original values, document any calculation, and describe any assumptions. When definitions or coverage remain uncertain, make that uncertainty part of the explanation rather than a footnote that changes the meaning of the headline.