. prior to adopting sfas no . 123 ( r ) , marathon recognized forfeitures as they occurred and applied the intrinsic value method to awards classified as liabilities . the adoption did not have a significant effect on marathon 2019s consolidated results of operations , financial position or cash flows . sfas no . 151 2013 effective january 1 , 2006 , marathon adopted sfas no . 151 , 2018 2018inventory costs 2013 an amendment of arb no . 43 , chapter 4