• If CH₄ emissions from manure management have been identified as a key category, whether these emissions have been estimated for significant animal types using an enhanced characterization and a Tier 2 method;
• Whether all types of manure management systems have been accounted for;
• For a Tier 2 method:
  • Whether country-specific emission factors, methane conversion factors (MCF), maximum CH₄ production capacity (Bo), and the share of the manure management systems have been utilized;
  • Whether  the basis of these data are provided, are reasonable, considering the country and animal conditions, and how well do they compare with IPCC default values
  • If default values (instead of country-specific data) for some or all species were used, whether these values are applicable to the national circumstances of their livestock populations;
  • Whether actual data on the usage of each type of manure management system have been collected;
  • If usage data were based on assumptions or expert judgment, whether such data are reasonable, available and presented in a transparent manner;
• For a Tier 1 method:
  • Whether country-specific emission factors have been used and, if so, whether the basis of these factors is appropriate to the region where the country is;
  • Whether there is support that default factors used are applicable to the national circumstances;
• Whether Parties have any changes in the types of manure management systems used over time, and whether such changes are reflected in the emissions time series.

Reference:
IPCC Good Practice Guidance, Section 4.3