Update Task Status Example | AI Sequence Diagram Refinement Tool

Keeping track of progress is vital in task management systems. The Update Task Status use case allows a team member to modify the current status of a task, add comments, and attach files so that the rest of the team can stay aligned. With the Sequence Diagram Refinement Tool, this scenario can be expanded into a detailed MVC structure that shows both the user-facing elements and the backend logic.

01 | Diagram Input

Paste or type your sequence diagram code (Mermaid or PlantUML) that describes a team member updating the task status. Alternatively, you can choose to generate one directly with the MVC System Architecture Generator.

Sequence Diagram PlantUML Example:

@startuml
actor "Team Member" as TM
participant "Web/Mobile UI" as UI
participant "Task Service" as TS
participant "Database" as DB
participant "Notification Service" as NS
participant "File Service" as FS
participant "Audit Log" as AL

TM -> UI : Login & Navigate to Project Dashboard
UI -> TS : Request Project & Task Details
TS -> DB : Fetch Task Details
DB --> TS : Task details
TS --> UI : Display Task Details

TM -> UI : Click "Update Status"
UI -> TS : Request Status Options
TS --> UI : Provide Status Dropdown

alt Valid Status Selection
TM -> UI : Select New Status\n[+Optional Comment]
else Invalid Status
UI --> TM : Error: "Please select a valid status"
end

TM -> UI : (Optional) Click "Attach File"
alt Attach File
UI -> FS : Upload File(s)
alt File Valid
FS --> UI : File Stored & Linked
else File Upload Failure
FS --> UI : Error: Retry/Cancel
end
else No File Attached
UI --> TM : Skips file upload
end

TM -> UI : Review Data & Click "Save"
UI -> TS : Submit Status, Comment, Attachments

alt Database Write Success
TS -> DB : Persist Changes
DB --> TS : Success
TS -> NS : Trigger Notifications
alt Notification Success
NS --> TS : Delivered
else Notification Failure
NS --> TS : Log Failure, Retry
TS --> UI : Warning: "Some notifications failed"
end
TS -> AL : Log Update (actor, timestamp, details)
AL --> TS : Logged
TS --> UI : Updated Task Details
UI --> TM : Show Updated Task
else Database Write Failure
TS --> UI : Error: "Unable to save changes"
TS -> AL : Log Exception
end

@enduml

02 | Rendered Sequence Diagram

Preview the initial sequence diagram by clicking Render Diagram. From here, you can either export it as an SVG or edit it in Visual Paradigm Online. To continue the refinement process, simply click Decompose Layers.

03 | Decomposed Architecture Layers

AI analyzes your diagram and extracts the architectural components. For this case, it may identify:

• View Objects: LoginForm, ProjectDashboardView, TaskDetailsPanel, …
• Model Objects: TaskService, TaskRepository, DatabaseConnectionPool, …

04 | Detailed MVC Sequence Diagram

AI expands the sequence into a refined MVC diagram, showing how the team member interacts with the interface elements, and how those requests are processed by the backend components. The resulting diagram can also be exported as an SVG or opened directly in Visual Paradigm Online for further editing.