The document discusses the adaptation of the open source software TRIADE using function point analysis. It presents the methodology used to adapt TRIADE, which involved estimating the lines of code and function points of the original and adapted versions. The results found that adapting TRIADE required around 2,000 function points, which could decrease development efforts by up to 90% compared to building similar software from scratch. However, the analysis has some limitations since conversion factors used to estimate function points have uncertain error margins. Future work should aim to directly measure function points from source code to address these limitations.

1. IWSM Mensura 2014
Moulla Donatien Koulla
University of Ngaoundere (Cameroon)

2. Overview
 Introduction
 Presentation of TRIADE and the
methodology used for its adaptation
 Results
 Limitations of the estimate approach
 Conclusion and future works
APPLICATION OF FUNCTION POINTS ON OPEN SOURCE

3. University of Ngaoundere
APPLICATION OF FUNCTION POINTS ON OPEN SOURCE

4. Introduction to Open Source
 Many software is developed from Open Source
There is a crucial need to estimate the efforts
spent in a project development based on Open
Source
 There are very few technical details about the
effort required to implement functionalities
APPLICATION OF FUNCTION POINTS ON OPEN SOURCE

5. Introduction to the case
Objective
 To adapt Open Source software called TRIADE
 To show that the development of applications
based on Open Source has many advantages in
terms of efforts
APPLICATION OF FUNCTION POINTS ON OPEN SOURCE

6. Presentation of TRIADE
APPLICATION OF FUNCTION POINTS ON OPEN SOURCE

7. Adaptation methodology
 The users of the platform
 The source code of the application
APPLICATION OF FUNCTION POINTS ON OPEN SOURCE

8. Functional architecture
Homepage of the
Application
Administrator identification
space
Private space
Messenger space
Management space
Transfer space
Institution space
News space
Student space
Student life space
Transcript space
Additional modules space
Head of Department
identification space
Private space
Messenger space
Management space
Transfer space
News space
Student space
Student life space
Transcript space
Additional modules space
Student affairs' office
identification space
Private space
Messenger space
Management space
Accounting space
News space
Student space
Lecturer identification
space
Private space
Messenger space
Mark space
Student space
Administration space
Student identification space
Private space
Messenger space
Student life space
Teaching or pedagogical
space
APPLICATION OF FUNCTION POINTS ON OPEN SOURCE

9. Case study procedure
 Step 1: Estimating the number of Lines of Code of
basic TRIADE and function points matching
 Step 2: Estimating the number of Lines of Code of
the adapted version of TRIADE and function points
matching
 Step 3: Determining the difference between the two
versions and the function points matching
APPLICATION OF FUNCTION POINTS ON OPEN SOURCE

10. The unadapted TRIADE application
Language
Lines of Code
(SLOC)
Function points
PHP 891,849 85.66% 16,723
XML 88,658 8.52% 693
ANSI C 51,074 4.91% 399
Java 8,940 0.86% 168
Perl 525 0.05% 15
Python 115 0.01% 2
SH 25 < 0.01% 00
TOTAL 1,041,186 (100%) 18,000
APPLICATION OF FUNCTION POINTS ON OPEN SOURCE

11. The adapted TRIADE application
Language
Lines of Code
(SLOC)
Function points
PHP 999,992 87.01% 18,750
XML 88,662 7.71% 693
ANSI C 51,074 4.44% 399
Java 8,940 0.78% 168
Perl 525 0.05% 15
Python 115 0.01% 2
SH 25 < 0.01% 0
Pascal 12 < 0.01% 0
TOTAL 1,149,345 (100%) 20,027
APPLICATION OF FUNCTION POINTS ON OPEN SOURCE

12. The adaptation of TRIADE
Language
Lines of Code
(SLOC)
Function points
PHP 108,143 99.98% 2,027
XML 4 <0.01% 0
Pascal 12 <0.01% 0
TOTAL 108,159 (100%) 2,027
APPLICATION OF FUNCTION POINTS ON OPEN SOURCE

13. Results
 Effort required to develop the adapted version of
TRIADE = the effort required to produce 2,027
function points
 Adaptation of TRIADE can decrease in function
points up to 90% compared to the development
from scratch
APPLICATION OF FUNCTION POINTS ON OPEN SOURCE

14. Limitations
 Conversion factors used have been disputed and
software measurement experts agree that we should
proceed with caution when using them
 Margins of error of these conversion factors remain
unknown
 Paper only measures the size of the functionality to
be implemented
APPLICATION OF FUNCTION POINTS ON OPEN SOURCE

15. Conclusion
1. This work addresses the issue of effort estimation for the
adaptation of software based on Open Source
2. This could build a way out in the African context where
the prices of proprietary software are often very high
3. This is a potential source for the development of African
countries
4. The present study might constitute a research frame on
the development and/or validation of a model of cost
estimation of software development based on Open
Source
APPLICATION OF FUNCTION POINTS ON OPEN SOURCE

16. Future work
Future work should preferably focus on exact measure of
function points, instead of using conversion factors which
are bereft of known error margins
We however think to use tools that help extracting FP
directly from source code based on data movements
we plan to deploy them in replication studies as part of our
research. Only then we could reduce the possible threats to
validity due to FP extraction. We will also include quality
analysis related to TRIADE
APPLICATION OF FUNCTION POINTS ON OPEN SOURCE

17. It is necessary for a good book to have critics. Virulent
and negative criticism isn’t the worst thing that can
happen to a work of art. What is unthinkable is when no
one says anything about it.
Nicolas Boileau-Despreaux
APPLICATION OF FUNCTION POINTS ON OPEN SOURCE