I have an application that reports on credit card transactions using credit card "terminals" - these are the handheld machines that you type in your PIN when you pay using a credit card. Each of these terminals has an ID so it is uniquely recognised.
The requirement is to identify terminals that are no longer used or are out of service. Identifying this fact is a little tricky as some terminals are used every day (so it's easy to identify when they are no longer used) but some are used during the week only and some weekends only.
Are there any tools or does anyone have any ideas regarding recognising the pattern of use (from the transactions) and identifying a "break" in that pattern?