Checking the Counting Accuracy - Groups
Proceed as with the checks on individuals but this time run the check with a number of people going through the zone: fifty or a hundred for example. Manually count the people and check this against the electronic count. Keep a note of the direction they were going, and what percentage were in wheelchairs or pushchairs or were children.
- In the VT Tuning screen click the Start Group Count button.
- Manually count at least 10 people passing through the zone. You can count in one direction or both.
- Click the Analyse Group Count and enter the number that you have manually counted. You'll also be asked whether they were going up or down screen—if you don't know leave this blank.
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VT Setup fills in its Event Summary table and shows the percentages of single counts, double counts an no counts for Up and Down directions.
- Based on the manual counts, it shows the accuracy of the count test as a percentage.
- Based on the accuracy percentages, the advice section suggests possible adjustments to improve accuracy.
- The Event Summary, at the bottom of the screen, helps you identify the cause of poor counting.
- To send the suggested settings to the VT unit, click the Apply to VT button.
Note: If you make a mistake when entering your manual counts, click the Change Group Facts button.