Description
Calculate a signed exhibit-volume balance after withdrawals and returns.
Forensic records distinguish exhibit identity, container links, declared conclusions, timestamp resolution and measurement bases. A matching seal string or recorded certificate is not authentication or proof of custody. Redacted display text and salt-version labels also do not by themselves establish sufficient de-identification or lawful disclosure.
Calculate a signed exhibit-volume balance after withdrawals and returns.
When to use this tool
Use Exhibit Sub Sample Volume Balance when checking the stated exhibit record, measurement, time or display-policy convention.
How to use the tool and how it works
- Enter openingVolume, withdrawnVolumes, returnedVolume. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read remainingVolume, totalWithdrawn. Use the output convention below.
Require nonnegative opening/returned volumes and withdrawal entries. Sum withdrawals; remaining=opening-totalWithdrawn+returned.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| openingVolume | Opening Volume | Required. Finite number; minimum 0. |
| withdrawnVolumes | Withdrawn Volumes | Required. Array of finite number; maximum items 256. |
| returnedVolume | Returned Volume | Required. Finite number; minimum 0. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| remainingVolume | Remaining Volume | Required. Finite number. |
| totalWithdrawn | Total Withdrawn | Required. Finite number. |
{
"input": {
"openingVolume": 10,
"withdrawnVolumes": [
1.5,
2
],
"returnedVolume": 0.5
},
"output": {
"remainingVolume": 7,
"totalWithdrawn": 3.5
}
}Limitations and assumptions
- Negative balances are retained and returned volume need not be bounded by withdrawals; no physical inventory or chain of custody 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 verified original evidence and custody records using qualified forensic and legal assessment for actual interpretation, disclosure and evidential decisions.
References
Similar or alternative tools
- Forensic Blank Sample Subtraction
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- Forensic Sample Dry Wet Mass Ratio
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