Histamine Sampling Tool
(Version 1.0)

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Analyze a Plan

This tool estimates the probability of accepting lots of product given that they are tested according to a user-defined sampling plan.
Default values are provided for the different parameters listed below. You can modify these default values to match your requirements and click "Compute Results" to view the sampling plan's performance.





Number of samples (n):     (1 to 1,000) The number of samples to be tested per lot.
Little m (mg/kg):     (1 to 200) Sample concentrations higher than little m are counted and compared to c, below. If the count exceeds c then the lot is rejected.
Acceptable number of samples
above little m (c):
    (0 to 200,
<= n-1)
This is the acceptable number of samples allowed above little m before the lot is rejected. A value of 0 indicates the lot will be rejected if any samples are found above little m. Note, if Big M is included, a single sample above Big M will result in the lot being rejected regardless of the value of c and c should be greater than 0.
Optional: a second concentration parameter,
Big M, is included for three-class sampling plans.
If a single sample has a concentration higher
than Big M, the lot is rejected.
Include Big M:
Concentration Threshold
for Unacceptability (M) (mg/kg):
      (10 to 500) Big M must be greater than little m if not included.
Histamine Limit (H) (mg/kg):     (10 to 500) This is a user-defined maximum acceptable concentration, often a health-based and/or regulatory limit.
Standard Deviation (log10):     (0.1 to 2.0) This is the expected standard deviation of the histamine concentration within a lot. It is on the log10 scale. When combined with a log10 mg/kg mean concentration value, it is used to generate a log-normal distribution of histamine concentration within the lot.
Results will be displayed below.
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