Evidence Preservation Date Calculator accuracy and testing

Formula source

• Estimated hold-through date = preservation trigger date + user-entered preservation window days + manual closure days when included, using the selected counting method and weekend handling. Review before date = hold-through date - reminder buffer days; the review interval is included in the method summary as the next cadence checkpoint.

Test cases

Known limitations

• Does not define the preservation duty, evidence scope, retention policy, custodians, litigation hold language, collection method, or release authority.

Assumptions

• The trigger date, preservation window, and review cadence are supplied by the user.
• The calculator assumes the preservation window is measured in calendar days unless the user changes the counting method.
• Defaults are operational examples only, not preservation law or legal-hold advice.

Unit handling

• Preservation Trigger Date accepts calendar dates.
• Preservation Window accepts values in days.
• Review Interval accepts values in days.
• Reminder Buffer accepts values in days.
• Counting Method accepts one of the configured options.
• Weekend Handling accepts one of the configured options.
• Holiday Calendar accepts one of the configured options.
• Manual Closure Days accepts values in days.

Rounding rules

• Number displays use up to 2 decimal places in the calculator UI.
• Input precision follows configured step values where provided.

Version history

Change log