We’ve read the first chapter from the Practical Object-Oriented Design in Ruby, by Sandi Metz.

These are the concepts and links brought up during the discussion:

Walking on water and developing software from a specification are easy if both are frozen.

Edward V Berard, source is Wikiquote

Two cited papers on metrics for design:

• A metrics suite for object oriented design by Chidamber and Kemerer
• A validation of object-oriented design metrics as quality indicators by Basili, Briand and Melo

The video for the ‘churn’ as a measure:

• The Hidden Dimension Of Refactoring by Michael Feathers