Which of the following is not a true statement about effective ratio analysis?

Ratios are used by the owners to develop incentive programs that encourage management to impact specific ratios.

Ratios are used by Bankers to evaluate the ability of the firm to maintain certain levels of debt and interest.

Ratios should NOT be used to compare across time or across firms. Ratios should be analyzed in isolation.

Ratios are used by Managers to help evaluate the future as well as an attempt to gauge how to correct current deficiencies.