Estimate of the functional size in the requirements elicitation


  • Mabel Angélica Bertolami Facultad de Ingeniería, Universidad Nacional de la Patagonia S. J. B., Comodoro Rivadavia, Argentina
  • Alejandro Oliveros Facultad de Informática, Universidad Nacional de La Plata, La Plata, Argentina


Scenarios, functional size, regression analysis


Early measurement of software size allows to estimate costs and effort as well as to plan the development schedule. In previous reports, an approach which applies the Function Points Analysis to the derivative Scenarios of the Language Extended Lexicon was presented. In the process of the validation of that proposal, statistical techniques were applied on a subset of the obtained data from the measurement of several cases of study. In this article, a linear regression analysis which allowed establishing an estimate model of the scenarios functional size and the verification of the validity of that model is presented. The results are encouraging as for the feasibility of the model and its possible subsequent refinements.


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[1] Rule, G., “The Importance of the Size of Software Requirements”,Software Measurement Services,NASSCOM Conference, India, 2001.
[2] Kemerer, C., “An Empirical Validation of Software Cost Estimation Models”, Communications of the ACM, Mayo 1987.
[3] Paulk, M., Curtis, B., Chrissis, M., Weber, C., Capability Maturity Model for Software, Version 1.1, Technical Report CMU/SEI-93-TR-024 ESC-TR-93-177, Feb. 1993.
[4] Symons, C., Software sizing and estimating MKII FPA, John Wiley and Sons, 1991.
[5] Boehm, B., Abts, C., Clark, Devnani-Chulani, B., COCOMO II Model Definition Manual, V1.4, University of Califormia, 1997.
[6] Bertolami, M., Una propuesta de Análisis de Puntos Función aplicado a LEL y Escenarios, Master in Software Engineering Thesis, Facultad de Informática, UNLP, La Plata, Argentina, 2003.
[7] Bertolami, M., Oliveros, A., “Análisis de Puntos Función en la elicitación de requerimientos”,Workshop on Requirements Engineering, Piracicaba, Brasil, 2003, pp. 32-47.
[8] Leite, J., Hadad, G., Doorn, J., Kaplan, G., “A Scenario Construction Process”, Requirements Engineering Journal, Vol.5, N° 1, 2000, pp. 38-61.
[9] Fenton, N., Pfleeger, S., Software metrics A rigorous and Practical approach, Second Edition, PWS Publishing Company, 1996.
[10] Jeffery, R., Walkerden, F., Analogy, regression and other methods for estimating effort and software quality attributes, en Kusters,B., Cowderoy, A.,Heemstra, F., van Veenendaal, E. (eds), Project Control for Software Quality, Shaker Publishing, 1999.
[11] Boehm, B., Abts, C., Chulani, S., Software Development Cost Estimation Approaches - A Survey, 2000.
[12] Leite J., Rossi G., et al, “Enhancing a Requirements Baseline with Scenarios”, Proceedings of RE 97’ International Symposium on Requirements Engineering, IEEE, 1997, pp. 44-53.
[13] Antonelli, L., Rossi, G., Oliveros A., Baseline Mentor, An Application that Derives CRC Cards from Lexicon and Scenarios, LIFIA, Facultad de Informática, UNLP, La Plata, Argentina, 1999.
[14] Bertolami, M., Centeno, E., LEL y Escenarios de la Recepción del Hotel, Case study developed in the Software Engineering Master, UNLP, La Plata, Argentina, 2001.
[15] IFPUG, Frequently Asked Questions, International Function Point Users Group, 2000.
[16] UKSMA, MKII Function Points Analysis Counting Practices Manual, Version 1.3.1, United Kingdom Software Metrics Association, 1998.
[17] Bertolami, M., Oliveros, A., “Proceso de medición de funcionalidad en la Elicitación de Requerimientos”, Proceedings 7º Workshop Iberoamericano de Ingeniería de Requisitos y Ambientes Software, IDEAS2004, Arequipa, Perú, 2004, pp. 91-102.
[18] Mauco, V., Ridao, M., del Fresno, M., Rivero, L., Doorn, J., Proyecto Sistema de Planes de Ahorro, Facultad de Ciencias Exactas, UNCPBA, Tandil, Argentina, 1997.
[19] Leite, J., Oliveros, A., Rossi, G., Balaguer, F., Hadad, G., Kaplan, G., Maiorana, V., Léxico Extendido del Lenguaje y Escenarios del sistema nacional para la obtención de pasaportes, Universidad de Belgrano, Buenos Aires, 1996.
[20] Hadad, G., Kaplan, G., Leite, J., Léxico extendido del lenguaje y escenarios del Meeting Scheduler, Technical Report #13, Departamento de Investigación, Universidad de Belgrano, Buenos Aires, 1998.
[21] Gil, G., Arias Figueroa, D., Oliveros, A., "Producción del LEL en un Dominio Técnico. Informe de un caso", Workshop on Requirements Engineering, Rio de Janeiro, Brasil, 2000, pp. 53-69.
[22] Esteban, N., Heidanowski, A., LEL y Escenarios de una Estación de Servicio, case developed for Tópicos I course in the Software Engineering Master, UNLP, Argentina, 1998.
[23] García, O., Gentile, C., LEL y Escenarios de LEL y Escenarios, Graduation dissertation, Facultad de Ciencias Exactas, UNCPBA, Tandil, Argentina, 2000, available online at:
[24] Montgomery, Runger, Probabilidad y Estadística aplicadas a la Ingeniería., 3ª.Ed., Mc. Graw Hill, 1996.
[25] Matemática 3.0 Standard Add-on Packages, Wolfram Researh, Cambridge University Press, 1996.
[26] Sincich, Statistics by example, 5ª Ed., Macmillan Publishing Company, 1993.




How to Cite

Bertolami, M. A., & Oliveros, A. (2005). Estimate of the functional size in the requirements elicitation. Journal of Computer Science and Technology, 5(02), p. 80–86. Retrieved from



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