You need to do a Business Impact Analysis for the systems at that location.

 

First you need to determine what applications run from there, then find out from applications support which departments within the company use these apps.

 

Then you will need to talk to the management of these departments (and these could be located anywhere within the corporate structure) to determine what the impacts are to that department if the app. is unavailable. These impacts can be financial, or impacting the ability to provide product, retain market share, process payroll or accounts receivable / payable, meet regulatory requirements etc. The impacts will usually increase over time - i.e. and hour or two is a minimum impact in many cases, but a day or two is a much greater impact.

 

You should also determine from the App. support people if there are any interdependencies between systems, so an app with a low impact could feed data to a higher-impact application that cannot continue processing without it, making the low-impact app just as critical to the overall operation.

 

Once you have the information summarize it in a spreadsheet or a report, tabulating the direct financial impacts, but not forgetting the "soft" impacts such as customer satisfaction, corporate reputation etc.