Understanding Make-Up Windows

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Make-up windows are currently turned OFF by default.

Please contact your Unit21 Representative to turn them ON.

Our models (rules) run over specific time periods based on execution dates & windows.

Sometimes, transactions that fall in a specific rule time window are sent to Unit21 after that rule window has executed.

When this occurs, the next time the rule runs, it will re-run the windows for any newly created transactions and generate alerts with transactions from previous dates. However, only transactions that are sent to Unit21 within the last 30 days will be considered.

For example, suppose a transaction was sent in 2 hours after it occurred, and a rule with make-up windows enabled runs every day looking back at 2 days of transactions. Then:

• October 30 10am: The rule will run and look back on data from October 28 10am to October 30 10am
• October 30 11am: Transaction is sent to Unit21 with event time as October 30 9am
• October 31 10am: The rule will run and look back on data from October 29 10am to October 31 10am (regular window). In addition, the rule will run and look back on data from October 28 10am to October 30 10am (make-up window).

However, suppose that same transaction was instead sent in 2 months after it occurred. Then:

• October 30 10am: The rule will run and look back on data from October 28 10am to October 30 10am
• October 30 11am: Transaction is sent to Unit21 with event time as August 30 11am
• October 31 10am: The rule will run and look back on data from October 29 10am to October 31 10am (regular window). No make-up windows will be run.