POM2 accepted eight input variables.  \textit{Criticality}: affects 
requirements development cost.  \textit{Criticality Modifier}: affects 
the severity of criticality. \textit{Culture}: affects requirements 
reordering and perceived value.  \textit{Initial-known}: sets the
size of the initial requirements set.  \textit{Inter-dependency}: 
frequency of inter-team dependency for requirements.  \textit{Size}: 
size of project (number of requirements).  \textit{Team size}: size of teams 
working on project.  \textit{Dynamism}: how frequently requirements' values 
change.
