$fis->inVar('quality',      0, 10,
             bad      =>  [ 0, 1, 2, 1, 4, 0 ],
             ok       =>  [ 2, 0, 4, 1, 6, 0 ],
             good     =>  [ 4, 0, 6, 1, 8, 0 ],
             excelent =>  [ 6, 0, 8, 1, 10, 1 ],
           );