Usage CAL is designed to use for overflow usage during peak times. A Usage CAL allows 1 user to have access to 1 QV Document(session) for 1 hour over a 28 day period. So ifa user use 1 Usage CAL for 1 hour, it becomes inactive and is not reset(recover) until the 28 day period has passed.
"n" Usage CAL
→ From the following day, n/28 numbers of Usage CAL will be recovered
・ ・ ・ ・
→ After 28 days, "n" numbers of CAL is recovered and available to use
Usage CAL count example
eg.1:Let's assume you have 1 Usage CAL. You used it and the counter starts.
→ After 1 day, counter becomes 1/28. After 2 days, counter becomes 2/28. After 5 days, counter becomes 5/28.........After 28 dyas, counter becomes 28/28. At this count(28 day period has passed), 1 CAL is recovered.
eg.2:Let's assume you have 5 Usage CAL. You used all and the counter starts.
→ After 1 day, counter becomes 5/28. After 2 days, counter becomes 10/28. After 6 days, counter becomes 30/28≒(Available 1 Usage CAL at this point)............After 28 days, counter becomes 140/28. At this point(28 day period has passed), 5 CAL is recovered.
So it is good to use when additional users will be accessing QlikView during peak times such as month/year-end closing or promotional campaigns.