The fastest way I've found is to create a data and domain model while working the UI in a wireframe tool. Review wireframe with users until they see what they expect and both UI and wireframe with developers until they understand the domain. Document and use as a guide, not the absolute truth or spec as many things will change. Then break the project into smaller pieces, prioritize, and build using agile.
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The fastest way I've found is to create a data and domain model while working the UI in a wireframe tool. Review wireframe with users until they see what they expect and both UI and wireframe with developers until they understand the domain. Document and use as a guide, not the absolute truth or spec as many things will change. Then break the project into smaller pieces, prioritize, and build using agile.