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Intelligent Sampler

Article author
Jonathon Plowman-Samson
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What is the Intelligent Sampler?

The MindBridge Intelligent Sampler is a tool used to generate samples in the Data Table. You can use the Intelligent Sampler to create samples that are either:

  • Risk-Stratified: This method uses the risk score of entries/transactions to stratify the population generated by the applied filter. This method is unique to MindBridge and favors high risk and medium risk entries/transactions when creating the sample.
  • Random: This method creates a truly random sample from the population generated by the applied filter. Unlike the risk-rated method, each item in the population has an equal chance of being selected, regardless of their risk level.

The 60/40 Split

When the Intelligent Sampler generates a sample, it selects all of the high-risk scores available to be sampled, and the rest of the sample is split to contain 60% medium risk transactions and 40% low risk. 

In the example below, 100 transactions were selected for the sample size. The financial data table contains 21 high risk transactions, so they are added to the sample. 

Of the remaining 79 possible transactions left for this sample, 47 (60%) are medium risk transactions while 32 (40%) are low risk transactions. 

How does the Intelligent Sampler Randomly Select Items?

When the Intelligent Sampler is launched, the data randomization process begins. Our method for randomizing the data is as follows:

The selected population is loaded from the dataset, and a Pseudorandom Number Generator (PRNG) is used to sort the population.

  • The PRNG is configured with a random seed based on system time and other variables;
  • A random number is generated for each item using the PRNG;
  • The items are sorted by their generated numbers; and
  • The lowest "n" (sample size) items are returned as the sample.

For risk-stratified sampling, the above process runs three times, for high, medium, and low-risk transactions. For random sampling it runs once across the whole population.

After sampling, the Intelligent Sampler will display the sampled total debits, credits, net value, and absolute value (seen above).

Clicking Add to Audit Plan will add each transaction or entry to the audit plan with an “Open” status.

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