When completing the Onsite Review Instrument (OSRI), it is essential to distinguish between events that took place over the life of the case, and events that took place during the Period Under Review, or PUR. Unless specifically indicated otherwise, all items in the OSRI pertain to the PUR. When it is necessary to look outside that period, the instructions in the OSRI will tell you to do so.
While the start date of the PUR will differ from one review to another, the end date of the PUR will be the Friday of the review week. You will be told the exact dates of the PUR onsite, and it will also be provided on your tablet.