Define “working” before the feature list grows
Fictional example: a customer portal should let a customer view their job status and submit a question. A working first version is not just a good-looking status screen. The correct customer must see the correct job, submit the question, and receive a clear confirmation; staff need a place to respond.
Draw the whole path
List the starting point, required information, main action, result, and next owner. Include what happens when a record is missing, access is denied, or the connection fails. Decide which parts can be handled manually at first without misleading the user.
Prototype the uncertain part
If you are unsure whether customers understand the status labels, test a simple prototype before building the full account system. If the main risk is whether another service can supply the data, verify that connection first with authorized sample data.
Agree on the first release
Write down what is included, what waits, and how you will decide it works. Include access controls, error handling, maintenance responsibility, and a way to recover from a bad change. Necessary safeguards are not optional features to cut when the scope gets smaller.
Observe actual use
Ask intended users to complete the task without coaching. Watch where they hesitate, what they misunderstand, and whether the result solves the problem. A test with a few people can reveal issues; it does not prove market demand or readiness for every customer.
Twelve unfinished features do not add up to one useful app. Start with one complete task, learn from it, and expand deliberately.