The purpose of an alternatives analysis is to identify an alternative that best satisfies the project’s purpose and need. The alternatives analysis report articulates a clear connection between the project’s purpose and need and the preferred alternative, in terms of evaluation results. Documenting dismissed alternatives is key and will prevent them from being reintroduced. See

Appendix I, Section 1 – Alternatives Analysis Tech Memo Sample Outline

for a suggested outline for an Alternatives Analysis Technical Memorandum