Exam ASD01 topic 1 question 9 discussion

Consider the following steps for a theoretical manual process.
✑ Check in input folder any new files.
✑ If there are no files check again later as files can arrive anytime, and there is no limit to the number of files that may come.
✑ Open the next available file.
✑ Take the first case.
✑ Start System X and find the case details.
✑ If the case can't be found, move to the next one.
✑ After finding the case in System X, fetch additional case details from System Y.
✑ Again if the case can't be found, move to the next one.
✑ Analyse all the data to see if System Z should be updated.
✑ If the data does not meet the requirements, add notes indicating this to System X and Y and move to the next case.
✑ If the data does meet the requirements, update the case in System Z.
✑ Add notes to System X and Y and move to the next case.
✑ At the end of the file, go back and look for another.
✑ Stop checking for new files at 16:00 and finish any remaining cases.
✑ When all work is complete create a report of the day's exception cases.
✑ Close down Systems X, Y and Z.
If it is possible that there are long intervals between files arriving, what are the alternatives the process should take to control System X, System Y and System Z?
(Choose two.)