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Calcimator

Acceptance Sampling Plan Calculator

Generate an acceptance sampling plan based on lot size, AQL, and inspection level. Determine sample size, accept/reject numbers, and operating characteristics.

Inputs

Results

Sample Size (n)

50

Accept Number (Ac)

0

Reject Number (Re)

1

Code LetterH
Inspection LevelNormal
P(Accept) at AQL60.5%
Avg Outgoing Quality0.57%
Est. LTPD4.6%
Avg Total Inspection425
How to Use This Calculator
  1. Enter Lot Size (N), AQL (%), and Inspection Level.
  2. Set Normal (Level II), Tightened, and Reduced.
  3. Review Sample Size (n), Accept Number (Ac), and Reject Number (Re).
  4. Use Code Letter and Inspection Level to inform your decision.
  5. Use the chart to visualize the results and explore different scenarios by adjusting inputs.

What each input means

Lot Size (N)
Total number of units in the lot to be inspected.
AQL (%)
Acceptable Quality Level — the maximum defect rate considered acceptable. Common values: 0.1%, 0.65%, 1%, 2.5%.
Inspection Level
Normal: standard inspection. Tightened: larger sample after quality dips. Reduced: smaller sample after sustained good quality.

How this is calculated

Worked example, using the default values

  1. Identify Input Parameters
    Lot Size (N) = 1000, AQL (%) = 1, Inspection Level = 1 = 3 input(s) provided
  2. Calculate Sample Size
    50 = 50
  3. Calculate Accept Number
    Accept Number
    0 = 0
  4. Calculate Reject Number
    Reject Number
    1 = 1
  5. Calculate Code Letter
    H = H
  6. Calculate Inspection Level
    Normal = Normal

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