Procurement warranty return batch calculator

Calculate units within supplied window with recorded evidence by supplier and records outside supplied date window with your own figures.

Your numbers

Use the units shown. Results update as you change valid inputs.

Use units within supplied window with recorded evidence by supplier and records outside supplied date window to compare changes to your inputs. The method and limits below explain the scope.

Examples

Examples

Try the starting example

Suppliers: name, minimum eligible batch units
A,3 B,1
Reported failures: ID, supplier, units, purchase date, supplied warranty days after purchase, evidence recorded yes/no; or none
I1,A,2,2026-10-01,30,yes I2,A,1,2026-10-10,10,yes I3,B,2,2026-09-01,30,no
Audit date
2026-10-20
Units within supplied window with recorded evidence by supplier
A: 3; B: 0
Records outside supplied date window
I3
Records lacking supplied evidence
I3
Earliest eligible supplied deadline by supplier
A: 2026-10-20; B: None
Suppliers meeting entered batch minimum
A

Try another scenario

Suppliers: name, minimum eligible batch units
A,3 B,1
Reported failures: ID, supplier, units, purchase date, supplied warranty days after purchase, evidence recorded yes/no; or none
I1,A,2,2026-10-01,30,yes I2,A,1,2026-10-10,10,yes I3,B,2,2026-09-01,30,no
Audit date
2026-10-21
Units within supplied window with recorded evidence by supplier
A: 2; B: 0
Records outside supplied date window
I2, I3
Records lacking supplied evidence
I3
Earliest eligible supplied deadline by supplier
A: 2026-10-31; B: None
Suppliers meeting entered batch minimum
None
Calculation method

Calculation method

Units within supplied window with recorded evidence by supplier

Count reported-failure units only when audit≤purchase date+entered days and evidence flag is yes.

Records outside supplied date window

List records where audit is after that entered inclusive deadline.

Records lacking supplied evidence

List evidence no independently of date eligibility.

Earliest eligible supplied deadline by supplier

Minimum deadline among eligible evidence-backed records, or None.

Suppliers meeting entered batch minimum

Compare eligible units to the supplier’s supplied minimum; no real return is created.

Symbols and units
a
Suppliers: name, minimum eligible batch units
b
Reported failures: ID, supplier, units, purchase date, supplied warranty days after purchase, evidence recorded yes/no; or none
c
Audit date

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 supplied reported-failure/date/evidence batch check, not a diagnosis, warranty entitlement decision or verification of a supplier’s terms.
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

OECD: procurement performance and contract-record background; calculations follow the displayed rules ↗

Background reading; this does not imply endorsement or independent review of SumFizz.

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