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Separate the business activity from the app that supports it. Practice naming the real-world job, the people involved, and the outcome before talking about screens, databases, or features.
Use what you learned in the previous lesson to solve real-world problems.
Recognize who actually acts, approves, waits, receives, or is accountable in a domain. Distinguish a domain role like “adjuster” or “customer” from a specific employee, team, or software system.
Check what you understood with a short quiz.
Listen to a short business conversation and pull out facts about objects, actions, rules, timing, and handoffs. Treat casual phrases as evidence about how the work really happens.
Use forms, applications, invoices, and checklists as clues to the domain. Read fields, required signatures, statuses, and missing information as signs of what the organization must know or decide.
Turn policy wording into concrete domain rules: when something applies, who it affects, and what result follows. Practice spotting rule words like “must,” “may,” “unless,” “eligible,” and “expires.”
Tell the difference between a fixed rule and a judgment call. Identify what information a person needs in order to approve, reject, prioritize, price, route, or escalate something.
Look for the cases that break the happy path: cancellations, overrides, late submissions, missing data, refunds, appeals, and special permissions. Use exceptions to reveal rules that ordinary examples hide.
Translate feature requests into the domain problem underneath. When someone asks for a button, report, alert, or status field, trace what work or decision they are trying to support.
Follow a domain thing such as an order, claim, booking, ticket, or application from creation to completion. Notice the events, status changes, ownership changes, and decisions that shape its life.
Pay attention to deadlines, durations, thresholds, units, prices, penalties, and rounding rules. These details often carry important domain meaning and can change how software must behave.
Recognize when a word belongs to the business instead of the implementation. Practice separating domain terms like “policyholder” or “available balance” from technical labels like “record,” “flag,” or “ID.”
Capture observations as evidence-backed domain notes instead of jumping into design. Write down the source, the fact you noticed, and the question it raises for a domain expert.
Review this chapter with practice based on your mistakes.
