Comparison of various forms of documents, worksheets, files, data have become necessary in today’s complicated world of business. Use of computer in the technical field has been vogue for a very long time. Invoking the facilities offered by computers is comparatively of recent origin may be during the 30 or 40 years only. Accountancy has found the computer to be an excellent appliance for their routine and complicated work. Accountants have the task of making quite a lot of financial forecast, with comparison with past performance. They find excel comparison tool as their best friend in doing their work.

The Power Pivot is advanced software to help in the comparison of data and information stored in two different places. These data may relate to the performance of a company and the other data may have data relating to availability of resources in the immediate future and also in the future forecast for the company. The business analyst has the task of finding out how realistic the forecast is, by making the comparison with past performance with resources available.
The analyst knows that the computer can do the comparison work for him I the many formats and classifications he needs. All that he does is to download both the forecast and the past performance in to two excel spread sheets and put them through the system to find about all the details of the variations between the two. This process is not only time saving but also brings out extremely accurate results in the manner the analyst wants. Excel has thus proved now a very handy tool for storing of data and also for making comparison between two sets of excel data.
You collect data from different sources and you can feed them into single excel spreadsheet and then it can then be divided into several work sheets according to the requirements. The data is collected from different sources and accountants usually put such data into excel formats. Then they can do the reshaping of the data and use it. The excel comparison tool gives them a helping hand in doing their analysis work.