What are common examiner traps in Function Point Metric?

Assuming 'not applicable' factors have a non-zero value rather than assigning Fi = 0. Forgetting to verify that all 14 adjustment factors are accounted for (e.g. failing to compute the count of 'remaining' factors correctly). Forgetting the standard constant 0.65 or scale 0.01 in the formula VAF = 0.65 + 0.01 Fi, since formulas are not typically given in the prompt. Multiplying counts by the wrong domain complexity weights when they are listed in order. Rounding prematurely before calculating the final product UFP VAF.

Function Point Metric

1 Qs · 2015 · 1 marks · 0.1 marks/paperStandard yield

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In GATE CS, the Function Point (FP) metric is tested as a direct numerical computation problem evaluating a candidate's grasp of Albrecht's Function Point analysis. Questions requi… Guide

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GATE CSE 2015 Set 3Q21NAT1 markMediumConsider a software project with the following information domain characteristics for calculation of function point metric. Number of external inputs (I) = 30 Number of external outputs (O) = 60 Number of external inquiries (E) = 23 Number of files (F) = 08 Number of external interfaces (N) = 02 It is given that the…

Topic guide

What does GATE test in Function Point Metric?

In GATE CS, the Function Point (FP) metric is tested as a direct numerical computation problem evaluating a candidate's grasp of Albrecht's Function Point analysis. Questions require computing the Unadjusted Function Points (UFP) from information domain values and their complexity weights, followed by calculating the Value Adjustment Factor (VAF) from 14 General System Characteristics (GSCs) to determine final adjusted Function Points. The topic relies entirely on standard mathematical formulas with multi-step arithmetic precision.

Core concepts

Information domain characteristics (External Inputs, External Outputs, External Inquiries, Internal Logical Files, External Interface Files)
Complexity weighting factors (Simple, Average, Complex)
Unadjusted Function Points (UFP)
General System Characteristics (14 value adjustment factors rated 0 to 5)
Total Degree of Influence (TDI)
Value Adjustment Factor (VAF) and Adjusted Function Point (FP) calculation

Recurring question patterns

Standard Function Point (FP) Computation
rare · NAT · 1 marks · 2015
Given counts of the 5 information domain characteristics (External Inputs, Outputs, Inquiries, Internal Files, External Interfaces) along with their respective weighting factors, plus specifications for the 14 Value Adjustment Factors (scale 0-5), compute the adjusted Function Point value.

Formulas GATE uses

Unadjusted Function Points (UFP)

\text{UFP} = \sum_{i=1}^{5} (\text{Count}_i \times \text{Weight}_i) = (I \times W_I) + (O \times W_O) + (E \times W_E) + (F \times W_F) + (N \times W_N)

Used to aggregate the weighted counts of all five information domain characteristics.

Total Degree of Influence (TDI / $\sum F_i$)

\text{TDI} = \sum_{i=1}^{14} F_i

Used to sum the influence ratings (0 to 5) across all 14 General System Characteristics.

Value Adjustment Factor (VAF / CAF)

\text{VAF} = 0.65 + 0.01 \times \sum_{i=1}^{14} F_i

Used to compute the adjustment factor that scales UFP based on general system complexity.

Adjusted Function Points (FP)

\text{FP} = \text{UFP} \times \text{VAF} = \text{UFP} \times \left(0.65 + 0.01 \times \sum_{i=1}^{14} F_i\right)

Used to compute the final adjusted function point metric value.

Examiner traps in Function Point Metric

Assuming 'not applicable' factors have a non-zero value rather than assigning Fi = 0.
Forgetting to verify that all 14 adjustment factors are accounted for (e.g. failing to compute the count of 'remaining' factors correctly).
Forgetting the standard constant 0.65 or scale 0.01 in the formula VAF = 0.65 + 0.01 Fi, since formulas are not typically given in the prompt.
Multiplying counts by the wrong domain complexity weights when they are listed in order.
Rounding prematurely before calculating the final product UFP VAF.

How questions are asked

Word problem specifying domain counts, weights, and factor influence levels to compute final FP (NAT)

Paper trends

Appears as a Numerical Answer Type (NAT) calculation requiring correct evaluation of both UFP and VAF formula components without providing the VAF formula directly in the prompt.
2015

Difficulty notes

Easy: Direct substitution when UFP and TDI are already given or weights are simple integers. Medium: Multi-step arithmetic requiring extraction of UFP from 5 characteristics and TDI from a worded distribution of the 14 factors (e.g., GATE 2015). Hard: Backward calculation (e.g., given final FP and some parameters, find an unknown count or missing adjustment factor weight).