Screen Aperture Efficiency Calculator

Audit independent correctly classified mass across actual tested apertures and retain tied best samples, distinct from product of coarse/fine recoveries; not optimized unsampled screen aperture. Caller independently verifies units, applicability and matching conditions; no operational recipe, safety certification, causal efficacy or legal/resource classification is inferred.

Description

Screen aperture comparisons need independently assessed correctly classified and total material.

Screen aperture comparisons need independently assessed correctly classified and total material.^[1]

Several tested apertures can share the best observed classification fraction.

When to use Screen Aperture Efficiency Calculator

Use this tool to calculate or review the supplied observations under the stated rules. Match completed survey or ledger observations by block, segment or stage and confirm their units and boundaries.

How to use Screen Aperture Efficiency Calculator and understand its results

Match completed survey or ledger observations by block, segment or stage and confirm their units and boundaries.
Enter observedScreenAperturesMm, observedCorrectlyClassifiedDryTonnes, observedTotalAssessedDryTonnes, using the field meanings and rules below, then run the tool.
Read observedCorrectClassificationFractions, bestObservedApertureMm. Inspect nested result fields where present, and review unknown records separately from known matches.
Correct any reported input issue and run again. Before using a successful result, check the stated units, signs, reference scope and observation coverage.

Input field	Meaning	Value type	Requirement
observedScreenAperturesMm	Observed screen apertures mm	list of number	Required
observedCorrectlyClassifiedDryTonnes	Observed correctly classified dry tonnes	list of number	Required
observedTotalAssessedDryTonnes	Observed total assessed dry tonnes	list of number	Required

Use aligned apertures>0, total assessed dry mass>0 and correctly classified mass≥0≤total. Compute correct/total, require apertures strictly increasing, and return all apertures exactly tied at the sampled maximum. No unsampled optimum is inferred.

score_i=correct_i/total_i; best={aperture_i:score_i=max(score)}

Use the matching field units and the exact boundary, ordering and reference rules above.

Output field	Meaning	Value type
observedCorrectClassificationFractions	Observed correct classification fractions; dimensionless fraction, not a percent	list of number
bestObservedApertureMm	Best observed aperture mm	list of number

json

{
  "input": {
    "observedScreenAperturesMm": [
      1,
      2,
      3
    ],
    "observedCorrectlyClassifiedDryTonnes": [
      2,
      3,
      4
    ],
    "observedTotalAssessedDryTonnes": [
      4,
      4,
      4
    ]
  },
  "output": {
    "observedCorrectClassificationFractions": [
      0.5,
      0.75,
      1
    ],
    "bestObservedApertureMm": [
      3
    ]
  }
}

Limitations and assumptions

Units, ledger boundaries, survey interpretation and model applicability must be independently established. These summaries do not assign reserve/resource classifications or establish support adequacy, ventilation safety or an operating setting.

Missing required fields, unknown fields, wrong types and violated rules return input issues. Numeric values and outputs must be finite. Lists and matrices must be dense, without missing cells. Numeric lists allow at most 10000 entries; ordinary string lists allow at most 128 strings of 128 UTF-16 units each; numeric matrices allow at most 128 rows and 128 columns, subject to narrower requirements above.

Alternative or Complementary methods

For a related step, use Screen Undersize Percentage Calculator: A sieve ledger groups dry mass by observed class size. For a complementary comparison, use Screen Oversize Percentage Calculator: A sieve ledger groups dry mass by observed class size.

References

Screen Aperture Efficiency Calculator — tool.io

Similar or alternative tools

Screen Undersize Percentage Calculator
A sieve ledger groups dry mass by observed class size.
Screen Oversize Percentage Calculator
A sieve ledger groups dry mass by observed class size.