Finally here, another thing to remember is that the process of a student completing or handing in the work, and it being marked really does consist of those two separate stages: handing in/completing; and marking. The main reason for this is that marking might actually occur several weeks after completion, yet ARCADE needs to know in the mean time whether the student has completed or not, so it can extrapolate performance in a timely manner and warn of students who are likely to fail. Thus whenever a mark is entered on the ARCADE sheets, it is important that the ``time'' of completion is also recorded. This time is recorded in one of three places: the student met the deadline (tick column 2), or they met the extended deadline (tick column 4) or they completed after the extended deadline (place the date of completion in column 5).
The data entry process is optimized to the correct completion of the sheets. A mark should never be entered in the final column unless there is a tick in column 2 (the deadline column) or a tick in column 4 (the completion by extended deadline column) or a date in column 5. If you (or your demonstrators) miss these ticks or the date then the best case is that the team of data-entry demonstrators's job of data entry is made much harder; the worst case is that the data is completely omitted and the student is automatically accused of missing the deadline!
So for example, if you were to leave the deadline, completion by extended deadline and date columns blank, but put a mark of 10 out of 10 in the mark column, you would in effect be saying: ``The student missed the deadline, missed the extended deadline, hasn't completed it yet, and has got 10 out of 10!".