"To propose an alternative" means suggesting a different option or solution as a substitute for what is currently being considered or done. It is an idea or proposal put forth as another choice to consider. Full definition
One aspect of the plan also proposes an alternative financing model for new developments through tax credits, tax - exempt bonds and Section 8 vouchers for 100 percent of the units. (gothamgazette.com)
Numerous researchers have proposed alternative strategies to help schools develop better programs for struggling students. (blog.foxspecialedlaw.com)