# CSC307 Lecture 14

Introduction to Software Engineering
Software Metrics
(202307)

July 17, 2023

## Transcript

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CSC 307
Introduction to Software Engineering
Lecture 14:
Software Metrics
Dr. Javier Gonzalez-Sanchez
[email protected]
www.javiergs.com
Building 14 -227
Office Hours: By appointment

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Metrics

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Metrics
Size
LOC
eLOC
lLOC
Complexity
Average, Max, Min LOC
Cyclomatic Complexity
Software Metrics

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Software Metrics
Size

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§ LOC – Lines of Code Metric. Including lines of a single brace or
parenthesis
§ LOC are used to create time and cost estimates.
§ LOC are a tracking tool to measure the degree of progress on a module or
project.
§ An experienced developer can gage a LOC estimate based upon
knowledge of past productivity on projects.
Size Metrics

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§ eLOC – effective Lines of Code Metric. Only code statements
§ An effective line of code or eLOC is the measurement of all lines that are not
comments, blanks or standalone braces or parenthesis. These can
inflate LOC metrics by 20 to 40 percent.
§ This metric more closely represents the quantity of work performed.
Size Metrics

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§ lLOC – logical Lines of Code Metric.
§ These statements are terminated with a semi-colon.
§ The control line for the "for" loop contain two semi-colons but accounts for
only one semi colon.
Size Metrics

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Example

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Test Yourselves

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Hello World

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BubbleSort Iterativo

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Recursive BubbleSort

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In Order Traversal

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Software Metrics
Complexity

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§ Cyclomatic Complexity. It is a quantitative measure of the number of
linearly independent paths.
§ Paths occur when "while,” "for,” "if,” "case," and "goto" keywords appear
within the function.
§ If the source code contained no control flow statements (conditionals or
decision points), the complexity would be 1
§ If the code had one single-condition IF statement, there would be two paths
through the code: one where the IF statement evaluates to TRUE and
another one where it considers to be FALSE.
§ Two nested single-condition IFs, or one block with two conditions, would
produce a complexity of 3.
Function Metrics

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Cyclomatic Complexity
CC = Edge - Node + 2
Or
CC = ConditionalNodes + 1

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i = 0; n=4;
while (ij = i + 1;
while (jif (A[i]swap(A[i], A[j]);
}
i=i+1;
}
// CC = 9 - 7 + 2 = 4
// CC = 3 + 1 = 4 (Condition nodes are 1,2 and 3 nodes)
// A set of possible execution path of a program
// 1, 7
// 1, 2, 6, 1, 7
// 1, 2, 3, 4, 5, 2, 6, 1, 7
// 1, 2, 3, 5, 2, 6, 1, 7
Cyclomatic Complexity

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Complexity Number Meaning
1-10 Structured and well written code
High Testability
Cost and Effort is less
10-20 Complex Code
Medium Testability
Cost and effort is Medium
20-40 Very complex Code
Low Testability
Cost and Effort are high
>40 Not at all testable
Very high Cost and Effort
Cyclomatic Complexity

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Compare

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Example Sprint 2

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Example Sprint 3

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New Tool
RSM

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Resource Standard Metrics (RSM) is a source code metrics and quality
analysis tool for ANSI C, ANSI C++, C# and Java for use on all Windows* and
UNIX operating systems.
http://msquaredtechnologies.com/
* Install the Windows version. It includes a easy to use friendly interface (RSM
Wizard).
Tool

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2. Review the user manual here
http://msquaredtechnologies.com
/m2wizard/RSM_Wizard_Manual.htm
Disclaimer:
It is a FREE tool…
Issues counting LOCs, eLOCs,
Issues counting conditions (syntaxis analysis)
BUT ±0..9 does not affect in biggest projects 🧐
Resource Standard Metrics

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Resource Standard Metrics

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Resource Standard Metrics

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Example Sprint 2

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Questions

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Office Hours
Tuesday and Thursday 3 - 5 pm
But an appointment required
Sent me an email – [email protected]

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CSC 307
Introduction to Software Engineering
Lab 14:
Software Metrics
Dr. Javier Gonzalez-Sanchez
[email protected]
www.javiergs.com
Building 14 -227
Office Hours: By appointment

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Calculate metrics for your
Shape App and Cluster App

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Let’s Work

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CSC 307 Introduction to Software Engineering
Javier Gonzalez-Sanchez, Ph.D.
[email protected]
Summer 2023
Copyright. These slides can only be used as study material for the class CSC308 at Cal Poly.
They cannot be distributed or used for another purpose.