Needs for more accurate greenhouse gas (GHG) emission estimation are increasing to prepare for post-Kyoto protocol and emission trading starting from 2015 in Korea. Although GHG emission from landfill is relatively low, uncertainty of methane emissions from landfill is very high compared to the other sectors. Moreover, accurate estimation is needed to design landfill gas collection system and energy generation plant. In this paper, we investigated development methodologies of parameters comprising methane generation potential (L0) which is one of key parameters in methane emission estimation models. DOC included four steps including analysis of waste component, water content, organic carbon content, fossil carbon content. Instead of analysis of organic carbon content and fossil carbon content, biochemical analysis, measuring content of cellulose, hemicellulose, and lignin, is used in MELMod, landfill gas generation model in UK. Methodologies to develop DOCF has several methods including batch test, lysimeter test and test cell. They had difference in scale and similarity to landfill, but it is hard to consider the best method at the present stage. Preceding research on MCF is little. Lysimeter test and test cell can be the candidate to develop MCF, because of flexibility on test condition to characterize the structure of landfill sites. F is defined as fraction of methane in landfill gas. But by carbon flow and mass balance, F should represent fraction of methane in biogas generated by anaerobic decomposition. In this definition, F can be derived by same methods to that of DOCF.