GB/T 42449-2023 in English
VALIDSystems and software engineering—Functional size measurement—IFPUG method
- Issued on:2023-03-17
- Implemented on:2023-10-01
- File Format:PDF
- Delivery:Via email within 5 business days
$388.00
《GB/T 42449-2023系统与软件工程 功能规模测量 IFPUG方法》由TC28（全国信息技术标准化技术委员会）归口，TC28SC7（全国信息技术标准化技术委员会软件与系统工程分会）执行，主管部门为国家标准委。
Introduction
Analysis of the core content of the standard
| Function type | Complexity dimension | FP value range |
|---|---|---|
| Internal logic file (ILF) | RET+DET combination | 7-15FP |
| External interface file (EIF) | RET+DET combination | 5-10FP |
| Transaction function (EI/EO/EQ) | FTR+DET combination | 3-7FP |
Key technical points
1. Standardization of measurement process: Strictly follow the five-step process of identification → classification → counting → calculation to ensure the comparability of measurement results.
2. Complexity judgment matrix: Cross-validate the data function complexity through the number of RET/DET, and adopt a three-level classification (low/medium/high).
Implementation Suggestions
- Establish a Function Point Count Committee to ensure measurement consistency
- Use the Requirement Traceability Matrix to associate functional requirements with FP counts
- Regularly calibrate historical project data to establish an organizational benchmark
Application Case
In the banking system enhancement project, the newly added loan and credit card function was measured:
- Modify ILF (7FP)
- Add EI transactions (3FP)
- Add EQ output (3FP)
- Total 13FP (IFPUG-GB/T)
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