iso-rating lines with slope Q = 0.6259 (published Table-8 scale)
How to read this: each point is a company placed by its expected default horizon µ (right = longer) and its consistency measure CCM; the diagonal lines are the seven published rating grades, so a firm's letter is just which band it falls in. Points below the AAA line sit beyond the scale's ceiling — that is the “everything is AAA” effect made visible.