Roy B. Kester, Accounting theory and practice… (1922)
“ In original construction work, before operations begin, all overhead charges constitute a part of the cost of the assets. For betterment work and additions carried on concurrently with operation, the case is not so clear. A safe principle is to treat as capital charges all increases in overhead above what would normally have been incurred for operation only. To free operation of any portion of the regular overhead just because betterments are in progress is not recognized as a sound or conservative policy. ”
