Investigation of Quality Changes between Versions of WEKA Data Mining Software Using QMOOD

Abstract

QMOOD (Quality Model for Object Oriented Design) is a hierarchical design quality model consisting of four layers and evaluates the relationships between these layers. This model calculates the values of software quality attributes using object-oriented software metrics. In this study, quality changes of open source WEKA data mining software versions were observed using QMOOD. While adding new features to the software and changing the software design structure directly affected the attributes of QMOOD, such as functionality, flexibility, and reusability, the hierarchy change of the versions caused volatility in the scores of extensibility and effectiveness. On the other hand, the increasing number of methods and classes in new versions negatively affected the value of understandability. As a result of the study, it was observed that the structural changes in the WEKA versions were parallel with the quality scores obtained with QMOOD.

Keywords

• Software Design Quality
• QMOOD
• WEKA

WEKA Veri Madenciliği Yazılımının Sürümleri Arasındaki Kalite Değişimlerinin QMOOD ile İncelenmesi

Abstract

QMOOD (Quality Model for Object Oriented Design), dört katmandan oluşan ve bu katmanlar arasındaki ilişkileri değerlendiren hiyerarşik yapılı bir tasarım kalite modelidir. Bu model nesneye dayalı yazılım metriklerini kullanarak yazılım kalite niteliklerinin değerlerini hesaplar. Bu çalışmada, QMOOD kullanılarak, açık kaynak kodlu WEKA veri madenciliği yazılımı sürümlerinin kalite değişimleri gözlenmiştir. Yazılıma yeni sürümlerde farklı özelliklerin eklenmesi ve yazılım tasarım yapısının değişmesi QMOOD'un işlevsellik, esneklik ve yeniden kullanılabilirlik gibi niteliklerini doğrudan etkilerken, sürümlerin kalıtım hiyerarşisi değişikliği ise genişletilebilirlik ve etkinlik niteliklerinin puanlarında oynaklığa sebep olmuştur. Anlaşılırlık niteliğinin değerini ise yeni sürümlerde artan metot ve sınıf sayısı olumsuz yönde etkilemiştir. Çalışmanın sonucunda QMOOD ile elde edilen kalite puanlarıyla WEKA sürümlerindeki yapısal değişimlerin paralel olduğu gözlenmiştir.

Keywords

• Yazılım tasarım kalitesi
• QMOOD
• WEKA

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