In both cases, you can use a special type of summary report layout that has a sub summary part, but no body part. With this layout setup, the individual records for each operation are not listed, only the sub totals.
To group your operations totals by week, add a calculation field that computes the date for Sunday of the same week from every date:
OperationDate - DayOfWeek ( OperationDate ) + 1
You can then set up your sub summary report part to sort by this field and then you can put a summary field that uses the "count of" option to count records (Specify a field to "count" that is never blank) inside this sub summary part. To pull up a report, you do a find for the dates you want and then sort the records by this new calculation field.
For your second report, set up the same type of layout, but set your sub summary part to sort by the operation date field instead of the new calculation field I described.
You can even put both sub summary parts on the same layout. You can control which subtotals appear by how you sort your records. Sort them by the Week calculation field, the first sub summary part appears and you get weekly totals. Sort them by the date field and the second sub summary part appears and you get daily totals. Sort by both fields, (week, then operation date) and you get both sub totals in your report.