However , the BGIT has its limitations , and thus can not always predict the precise heat of formation .
Furthermore , although the theory is old , it still is practically useful as one of the best group additivity methods aside from computational methods such as molecular mechanics .
The BGIT has its limitations , and thus can not always predict the precise heat of formation .
Furthermore , although the theory is old , it still is practically useful as one of the best group additivity methods aside from computational methods such as molecular mechanics .