Function Point Analysis Calculator
This calculator helps software engineers determine the size and complexity of a software system using Function Point Analysis. It is a valuable tool for project managers and developers to estimate project costs and timelines.
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Data Source and Methodology
All calculations are based on the International Function Point Users Group (IFPUG) standards. For more details, visit IFPUG. All calculations rely strictly on the formulas and data provided by this source.
The Formula Explained
The Function Point Analysis formula considers five components: External Inputs, External Outputs, External Queries, Internal Logical Files, and External Interface Files. Each component is assigned a weight based on its complexity, and the total function points are calculated as follows:
FP = (EIs * 3) + (EOs * 4) + (EQs * 3) + (ILFs * 7) + (EIFs * 5)
Glossary of Variables
- External Inputs (EIs): User inputs that are processed by the system.
- External Outputs (EOs): Outputs generated by the system for end-users.
- External Queries (EQs): User-initiated queries that retrieve data.
- Internal Logical Files (ILFs): Data files maintained within the system.
- External Interface Files (EIFs): Files shared with other systems.
How It Works: A Practical Example
Consider a project with 10 External Inputs, 15 External Outputs, 5 External Queries, 7 Internal Logical Files, and 3 External Interface Files. Using the formula, the total function points would be calculated as:
FP = (10 * 3) + (15 * 4) + (5 * 3) + (7 * 7) + (3 * 5) = 162
Frequently Asked Questions (FAQ)
- What is Function Point Analysis?
- Function Point Analysis is a standardized method to measure the functionality provided by a software system.
- Why use Function Point Analysis?
- It helps in estimating project cost, effort, and schedule based on the size of the software.
- Can Function Points be used for non-software projects?
- No, Function Point Analysis is specifically designed for software projects.
- What are the benefits of using this calculator?
- It provides a quick and precise estimation of system size, which aids in better project management.
- How accurate is the Function Point Analysis?
- Its accuracy depends on the quality of input data and adherence to the standard methodology.