Across four large object-oriented products, class size and defect proneness showed a significant logarithmic relationship, with defect proneness increasing as classes grew but at a slowing rate.

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Location PART 1 - TONS OF PUNKS, ONE BIG JERK CHAPTER 4: KEYSTROKES AND BRUSHSTROKES Expansive Side

"Across four large object-oriented products, class size and defect proneness showed a significant logarithmic relationship, with defect proneness increasing as classes grew but at a slowing rate."

The study supports a module-level size-defect relationship, not a universal law that every additional line of code increases all software risks logarithmically.

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Source title An investigation into the functional form of the size-defect relationship for software modules

Source authors A. Güneş Koru; Dongsong Zhang; Khaled El Emam; Hongfang Liu

Source year 2009

Confidence high

Importance high