Iwsm2014 application of function points to software based on open source - a case study (donatien koulla moulla)
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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.
Iwsm2014 application of function points to software based on open source - a case study (donatien koulla moulla)
- 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