The utility of EBITDA for providing a standardized unit of comparison among multiple enterprises must be considered within the context.
Working Capital
For example, a change in working capital from period to period would not be evidenced in the EBITDA metric and must be identified separately. In the case of a period wherein the company decreased accounts payable or built inventory or receivables, this might cause EBITDA to be understated.
Capex
When considering more than any single period, capital expenditures likely would still be relevant. Capital intensive enterprises might then require a better evaluation with EBIT or EBITDA-CAPX.
Anomalies
Unusual, non-recurring expenditures might be excluded with a normalized result being more representative.
Distress
As with anomalies, a normalized metric might be produced.
STEPHEN G. MOYER, DISTRESSED DEBT ANALYSIS: STRATEGIES FOR SPECULATIVE INVESTORS, 102-103 (J. Ross Publ'g. 2005) (providing a pragmatic description of pre-petition and post-petition investment opportunities and challenges).
See also Example EBITDA Comparison and Credit Tolerance.