Identify the IFE of Amazon follow these steps

List key internal factors as identified in the internal-audit process.

Assign a weight that ranges from 0.0 (not important) to 1.0 (all-important) to each factor.

Assign a 1-to-4 rating to each factor to indicate whether that factor represents a strength or weakness.

Multiply each factor's weight by its rating to determine a weighted score for each variable.

Sum the weighted scores for each variable to determine the total weighted score for the organization