Are you looking for a general explanation of the Visibility index and how it can be improved? Have a look at this article in our help centre.
The allocation rate and visibility index are the two most important indicators of how much visibility data a carrier is sending to Visibility Hub. The higher both values are, the better. The progress shown for each of these values tells you how much the carrier has improved or declined over a certain timeframe.
To calculate the progress, Visibility Hub first calculates the allocation rate and visibility index of the current period. E.g. when you choose the start time "This week", Visibility Hub calculates the allocation rate and visibility index by looking at all transports that started this week. You can change the start time by choosing a different Start time filter value from the Filter dropdown in the Visibility view of the Transport Network.
Next, Visibility Hub calculates the allocation rate and visibility index of the previous period. The previous period is automatically chosen based on the current period. E.g. if the start time chosen is "This week" then Visibility Hub will look at all transports from last week to calculate the visibility index and allocation rate. If you choose "Last week" as start time, then the previous period will be the week before that. If you choose "Last 30 days", then Visibility Hub picks the previous month as period.
Once the values of both periods are calculated, we use a simple subtraction to calculate the progress: current_value - previous_value = progress. E.g. the start time is "This week" with a current allocation rate of 50% and a current visibility index of 35%. The previous week, the allocation rate was 56% and the visibility index was 30%.
Allocation rate progress: 50% - 56% = -6
Visibility index progress: 35% - 30% = +5
You can also choose "Specific dates" as current time period. Visibility Hub will use the exact same duration as previous period. E.g. you choose the 10 first days in May 2021 as current time period. So Visibility Hub will use the last 10 days of April 2021 as previous period for the progress calculation.