Suppose your organization is considering adding support for a new currency and that you are going to have to expand the existing exchange rate data field from 9(5)V9(3) to 9(5)V9(6) to accommodate the currency. You will need to know the data fields that are affected in the database, intermediate fields that might contain or use the exchange rate field in calculations, and so forth.
Use Change Analyzer to search for the exchange rate field. The object of the search is called a seed field:
Once you have found the exchange rate field, you can use Change Analyzer to detect its synonyms. A synonym is a data field whose value is related to the value of a seed field: a field whose value is assigned by a MOVE or REDEFINE statement, for example. In these cases, if you increase the size of the seed field, you will probably need to increase the size of its synonyms as well.
Not every seed field or synonym will be affected by a proposed change. You need to examine the source code for each instance of the field carefully in the Change Analyzer Source pane and in the Interactive Analysis tools accessible from the Source pane. You may want to perform an impact trace showing the flow of data to the field as documentation, or to ensure that you have accounted for each instance.
Once you determine which fields are affected by a proposed change, you can move the fields between seed lists: Working and Affected, for example. You can generate reports based on your lists, as well as reports showing the affected source code in context.