Description
For ascending data subtract the previous cumulative value, starting at zero; for descending subtract the next, ending at zero.
Powder density and sieve calculations depend on preparation, tapping, size boundaries, and reporting direction. Computing an index does not choose a validated procedure or acceptance category.
For ascending data subtract the previous cumulative value, starting at zero; for descending subtract the next, ending at zero.
When to use this tool
Use Granule Sieve Cumulative Increment Crosswalk when you need a supplied powder-density or sieve-data crosswalk.
How to use the tool and how it works
- Enter cumulative, descending. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read increments, total. Use the output convention below.
Require nonempty nonnegative cumulative values ordered according to descending. For ascending data subtract the previous cumulative value, starting at zero; for descending subtract the next, ending at zero.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| cumulative | Cumulative | Required. Array of finite number; maximum items 256. |
| descending | Descending | Required. Boolean. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| increments | Increments | Required. Array of finite number; maximum items 256. |
| total | Total | Required. Finite number. |
{
"input": {
"cumulative": [
10,
30,
100
],
"descending": false
},
"output": {
"increments": [
10,
20,
70
],
"total": 100
}
}Limitations and assumptions
- Ordering is explicit and totals are not required to equal one or 100; this crosswalk does not validate sieve recovery or particle measurements.
- 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
Follow the applicable validated test method and interpret results against approved material-specific criteria.
References
Similar or alternative tools
- Granule Sieve Edge Policy
Require lower < upper and select zero-based positions whose sizes satisfy the chosen inclusive or strict bounds at each end.
- Pharma Powder Bulk Tapped Density Gap
Divide mass by bulkVolume and tappedVolume for densities.