含认证要求的用例图创建方法咨询：新手团队求最佳实践

Hey folks! As someone who’s walked through this exact scenario with new teams, let’s break down the best practices for modeling use cases when your web app mixes public, unauthenticated content with login-required features. This is super common, and getting it right early will save your team tons of confusion down the line.

1. Start with Clear Actor Roles #

First, lock down distinct actor types to eliminate ambiguity across your team:

• Public User: Any visitor who hasn’t logged in (can access open content like homepages, blog posts, or product listings)
• Authenticated User: Users who’ve successfully logged in (can access restricted features like profile edits, order history, or personalized content)
• Privileged User (if applicable): Admins or users with special permissions for things like content moderation

This simple split ensures everyone on the team agrees who can interact with which features from the get-go.

2. Model Authentication Consistently #

There are two clean, industry-standard ways to handle the login requirement—pick one and stick with it to keep your diagrams consistent:

Option A: Use «include» for Dependent Features #

For every restricted use case (e.g., "Update Account Profile"), add an «include» relationship to a core "Login" use case. This makes it explicit that the restricted action requires authentication first.

• Example flow: Authenticated User → «include» Login → "Update Account Profile"
• Pros: Super clear for stakeholders to see which features need login; easy to update if your login flow changes later.

Option B: Split Flows by Actor Type #

Have the Public User only interact with open use cases, and the Authenticated User only interact with restricted ones. If a public user tries to access a restricted feature, model that as an «extend» relationship:

• Example flow: Public User → «extend» Login → Become Authenticated User → Access "View Personal Dashboard"
• Pros: Keeps your diagram clean by separating public and authenticated flows entirely; great for simpler apps with clear boundaries between feature sets.

3. Keep Use Cases Granular & Goal-Focused #

Avoid giant, vague use cases like "Use Web App". Instead, split actions into specific, actor-centric goals:

• ✅ Do: "View Public Blog Post", "Submit Support Ticket", "Reset Password"
• ❌ Don’t: "Manage User Account" (split this into smaller, actionable use cases)

Granular use cases are easier to validate with stakeholders, iterate on, and map to development tasks later.

4. Align on Team Standards Early #

Since you’re new to formal project work, take 15 minutes as a team to agree on:

• What counts as a use case (remember: it’s a goal the actor wants to achieve, not a technical step like "Click Login Button")
• How you’ll visually distinguish public vs. restricted features (e.g., color-coding, tags, or notation)
• Which authentication modeling approach you’ll use (Option A or B above—consistency is key!)

Quick Example Structure for Your Scenario #

Public User Actions:

• View Public Homepage
• Browse Open Product Catalog
• Initiate Password Reset

Authenticated User Actions:

• «include» Login → View Personal Order History
• «include» Login → Submit Product Review
• «include» Login → Update Profile Settings

This structure keeps things clear, scalable, and easy for your team to build consensus around.

内容的提问来源于stack exchange，提问作者FilipRistic