Examples
Examples
Try the starting example
- Sources: name, allowed age hours
- X,2 Y,1
- Feed records: unique ID, source, last-updated timestamp
- A,X,2026-10-20T10:00 B,X,2026-10-20T08:00 C,Y,2026-10-20T12:00
- Audit time on same fixed-offset clock
- 2026-10-20T12:00
- Signed record ages (hours)
- A: 2; B: 4; C: 0
- Records older than source allowance
- B
- Fresh nonfuture record share (%)
- 66.666667
- Records dated in the future
- None
- Oldest nonfuture record age (hours)
- 4
Try another scenario
- Sources: name, allowed age hours
- X,4 Y,1
- Feed records: unique ID, source, last-updated timestamp
- A,X,2026-10-20T10:00 B,X,2026-10-20T08:00 C,Y,2026-10-20T12:00
- Audit time on same fixed-offset clock
- 2026-10-20T12:00
- Signed record ages (hours)
- A: 2; B: 4; C: 0
- Records older than source allowance
- None
- Fresh nonfuture record share (%)
- 100
- Records dated in the future
- None
- Oldest nonfuture record age (hours)
- 4
Calculation method
Calculation method
Signed record ages (hours)
(Audit time−last updated)/60.
Records older than source allowance
Age strictly greater than that source’s supplied allowance.
Fresh nonfuture record share (%)
Nonfuture records with age≤allowance / all records×100. Future records remain in the denominator and are separately flagged.
Records dated in the future
List records whose update time follows the audit time.
Oldest nonfuture record age (hours)
Maximum non-negative age, or an explicit no-nonfuture status.
Symbols and units
- a
- Sources: name, allowed age hours
- b
- Feed records: unique ID, source, last-updated timestamp
- c
- Audit time on same fixed-offset clock
Use the units shown. A list keeps the order in which you enter its values. The symbol ^ means “raised to the power of”.
Assumptions & limits
Assumptions & limits
- A timestamp/cadence audit on one supplied fixed-offset clock. It does not fetch feeds, infer freshness guarantees or treat a recent timestamp as proof of accurate data.
Are these inputs private?
These calculations run in your browser. A shared link contains the values you choose to share. Only questions submitted to the separate AI finder are sent to OpenAI.
Further reading
Google Merchant Center: product-data terminology and consistency background ↗
Background reading; this does not imply endorsement or independent review of SumFizz.