Identifying and measuring data functions is an essential step in the process of Function Point Analysis and one of the most relevant, with a significant impact on the result of the count.
According to the IFPUG Counting Practices Manual (CPM), the main stepsfor measuring data functions are:
Identifyand classify logical files.
Determine the functional complexity for each data function.
Determine the functional size for each data function.
Step 1 “Identify and classify logical files” includes as asub-step the grouping of related entities that are entitydependent into logical files,combining two types of analysis; one driven by process – based on the user transactions, and one driven by data – based on the business rules.
Although measuring data functions requires, from the function point analysts, skills and experiences regarding system data modelling, data normalization, entityrelationships, cardinalities, primary and foreign keys, among others;this paper aims to provide complementary guidance and a simplification of the analysis on how to group entities into logical files,by applying the concepts from the CPM.
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| White Paper: Guidelines for Logical Files Identification |