The Impact of Details in the Class Diagram on Software Size Estimation

摘要

Programines irangos apimtis - svarbus veiksnys planuojant projektus programu sistemoms sukurti. Žinotni keli programines irangos apimties vertinimo metodai; daugumas iš ju apimti vertina panaudodami funkcinius taškus. Funkciniu tašku metodas, kaip metodas, nepriklausan-tis nuo konkrečios technologijos ir išreiškiamas savarankiško abstrakcijos lygmens terminais, buvo pasiulytas Albrechto. Tačiau ši abstraktu aparata sunku pritaikyti šiuolaikinems technologi-joms. Todel daugelis mokslininku siulo papildomas taisykles ir atvaizdžius, pritaikytus objektinei paradigmai. Šiame straipsnyje aptariamos ir lyginamos kelios atvaizdavimo strategijos. Panaudojant atskleistus šiu strategiju panašumus,pasiulyta bendresne atvaizdavimo strategija. Ši strategija buvo testuota, panaudojant penkis modelinius pavyzdžius. Testavimo scenarijaus tikslas buvo ivertinti, koki poveiki programines irangos apimties vertinimui turi klasiu diagramos detalumo laipsnis. Nors objektines programu sistemos apimties vertinimo problema ir nebuvo galutinai išspresta, gauti rezultatai yra vertingas inašas i jos sprendima.%Software size is an important attribute in software project planning. Several methods for software size estimation are available; most of them are based on function points. Albrecht introduced function points as a technologically independent method with its own software abstraction layer. However, it is difficult to apply original abstraction elements to current technologies. Therefore researchers introduced additional rales and mappings for object-based solutions. In this paper several mapping strategies are discussed and compared. Based on the similarities in compared mappings, a common mapping strategy is then defined. This mapping is then tested on the reference application portfolio containing five applications. The aim of the test scenario is to evaluate the impact of the diverse detail levels in the class diagrams on software size measurement. Although the question of how to perform quality size measurements in object-oriented projects remains unanswered, the paper gives valuable information on the topic, supported by mathematics.