The Passenger Random Selection feature in Helipass allows customers to randomly select passengers at the time of check-in for a variety of purposes.  One common example scenario involves drug screening, where customers choose to select a given percentage of checked-in passengers to participate in a drug screen. 

The feature uses a set of configured rules to assign a chance of selection to each passenger checking in.  At the time of checkin, the system scans the rule set to determine if the passenger’s checkin satisfies the rule.  If the passenger meets the rule criteria (a “Hit”), the rule is applied.

The workflow on the following page describes the operation of the feature. 

Rules in the ruleset are processed sequentially from top to bottom.  If a checkin matches the criteria for multiple rules, then each rule will be processed in series.  As each rule is processed, the system will determine randomly—given a configured percent chance—if the passenger is selected.

For example:

• Passenger John Doe checks in
• Rule #1 is assessed – no match
• Rule #2 is assessed – John Doe is a match
  • 65% chance of selection
  • At a 65% chance of selection John Doe is NOT selected
• Rule #3 is assessed – John Doe is a match
  • 25% chance of selection
  • At a 25% chance of selection, John Doe IS selected
• Rule #4 is assessed – John Doe is a match
  • 10% chance of selection
  • At a 10% chance of selection, John Doe is NOT selected
• Result of ruleset is YES
• Result is indicated on boarding passes/bag tags

In this example, 2 rules applied to passenger John Doe.  As the result of one rule was a YES, the overall result was a YES. 

In scenarios where multiple rules may apply to a passenger checkin, and it is required that a lower-chance rule take precedence over a higher-chance rule, it is recommended that the “Stop on Hit” feature be used.  This feature forces the system to stop applying additional rules once a rule’s criteria are met.

For example:

• Passenger John Doe checks in
• Rule #1 is assessed – no match
• Rule #2 is assessed – John Doe is a match
  • 10% chance of selection
  • At a 10% chance of selection, John Doe is NOT selected
  • “Stop on Hit” is selected, further rule processing is halted
• Rule #3 is not assessed
• Rule #4 is not assessed
• Result of ruleset is NO
• Result is indicated on boarding passes/bag tags

In this example, the “Drug Screening” rule will be applied based on 2 lists of companies and a default, “baseline” selection chance.  The rule is designed to do the following:

• For passengers that work for “high risk” companies, screen passengers with a 50% chance of selection
• For passengers that work for “low risk” companies, screen passengers with a 10% chance of selection
• Select all other passengers with a 25% chance of selection

Create the high risk rule

Navigate to Security > Security Rules

Configure the “low risk” rule

Rule conditions will be based on passenger company.  Label the rule appropriately, and specify the selection chance.  In this scenario, choose “stop on hit” to ensure low risk passengers are selected at the lower 10% threshold.  Click “Configure List” to select companies to include in the selection rule.

Next, select applicable companies.  Drop-down the “available companies” list and begin typing the name of a company.  Click the blue right-arrow to add the selected company to the list.  When complete, click “done,” then click “save”

Next, configure the high-risk rule.  Follow the same process to create a new rule

For the high-risk rule, it may not be necessary to use the “stop on hit” feature.  Note, however, that “stacking” selection percentages does incur an aggregate chance of selection.  See the note below for details

The final rule should not have a specified condition; this is a baseline rule and will apply even if no other rules apply.  In general, this rule will be last in the set.

The final rule-set in this scenario resembles the one below.