Description
Measure a displayed price's signed gap from a supplied reference price.
Consumer records distinguish events, choices, prices, quantities and supplied survey scales. A unit-price comparison requires comparable goods and quantity units, while a reversed score retains the original scale bounds. An observed time gap or selected option does not establish motivation, causation, consent or the fairness of a commercial practice.
Measure a displayed price's signed gap from a supplied reference price.
When to use this tool
Use Promotion Reference Price Display Gap when you already have referencePrice, displayedPrice and need to measure a displayed price's signed gap from a supplied reference price.
How to use the tool and how it works
- Enter referencePrice, displayedPrice. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read signedGap. Use the output convention below.
Return displayedPrice-referencePrice with signs preserved.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| referencePrice | Reference Price | Required. Finite number. |
| displayedPrice | Displayed Price | Required. Finite number. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| signedGap | Signed Gap | Required. Finite number. |
{
"input": {
"referencePrice": 12,
"displayedPrice": 17
},
"output": {
"signedGap": 5
}
}Limitations and assumptions
- No advertised reference, actual promotion, legality, discount, tax or consumer response is verified.
- Inputs must satisfy both the field types and the cross-field conditions above. Invalid input causes an error; a successful false flag or documented placeholder is a different result.
- Numeric calculations use binary floating point unless exact decimal-integer arithmetic is explicitly stated. No hidden measurement tolerance or decimal rounding is added; nonfinite or out-of-contract results are rejected. Numeric signed-zero results are exported as zero.
Alternative or Complementary methods
Review the original transaction, interface, survey and event records for a behavioral conclusion. Use the complete study design and applicable commercial terms when interpreting comparisons; local flags and ratios do not estimate demand or verify an actual customer experience.
References
Similar or alternative tools
- Product Price Unit Reference Label
Label a supplied product reference-quantity price and return price per unit.
- Sample To Full Size Price Ratio
Compare sample and full-size supplied unit prices.