How is a function structure diagram different from an architecture diagram?

The function structure diagram is a tree of what the system does; the architecture diagram shows what the system is made of: frontend, backend, database, middleware. Capstone reports usually need both, and the template library has a web application architecture template.

Should the lines have arrowheads?

Many university examples use plain lines. Replace every --> with --- in Mermaid for lines without arrowheads; nothing else changes.

Too many modules to fit in Word. What can I do?

This template runs left to right so modules stack vertically, and a dozen or more fit on one page. Beyond that, split the user side and admin side into two figures; Word export scales the image to the page width, so tiny text means it is time to split.

System Function Structure Template (Capstone Project)

Function structure diagram for an XX management system, split into user and admin sides and their modules as a left-to-right tree. For capstone report system design chapters; free PNG, Word and PowerPoint export.

Previewed in the “Indigo” theme; you can switch themes in the editor

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Once open you can edit the text, switch themes and style, and change the layout before exporting. The download buttons here give you the template as is

When to use it

The function structure (functional decomposition) diagram in the system design chapter of a "design and implementation of an XX management system" capstone report. The system name is on the left, the second level splits by role into user and admin sides, and the third level lists their modules. It is one of the most common figures in computing capstone reports.

Making it yours

Double-click the system and module names in the preview to edit them; add a module with another line such as M --> M6[Announcements].
Three roles (student, teacher, admin): add a second-level node S --> T[Teacher side] and hang its modules under it.
To break a module down further (create, edit, delete users), add another level: M1 --> M11[Add user]. A full fourth level makes the figure very wide, so expand only the key modules.
If your university's example is a top-down tree, change the first line to flowchart TB or switch direction in the Layout menu; with many modules it gets wide and the text shrinks.
Switch to a light theme before exporting if the report is printed in black and white.

Mermaid code

flowchart LR
    S[XX management system]
    S --> U[User side]
    S --> M[Admin side]
    U --> U1[Sign up and log in]
    U --> U2[Browse and search]
    U --> U3[Book / order online]
    U --> U4[My account]
    M --> M1[User management]
    M --> M2[Content management]
    M --> M3[Order management]
    M --> M4[Statistics]
    M --> M5[Settings]

Ask an AI for one with this structure

Send the prompt below to ChatGPT or Claude, then paste the whole reply into the editor; the code inside is detected automatically.

Draw a system function structure diagram in Mermaid flowchart LR syntax for [XX management system]. Level one is the system name, level two splits by role into [user side, admin side], level three lists each role's modules: [user side: sign up and log in, browse and search, book online, my account; admin side: user management, content management, order management, statistics, settings]. Use plain left-to-right arrows only, with no extra notes. Output only the mermaid code block.

FAQ

How is a function structure diagram different from an architecture diagram?: The function structure diagram is a tree of what the system does; the architecture diagram shows what the system is made of: frontend, backend, database, middleware. Capstone reports usually need both, and the template library has a web application architecture template.
Should the lines have arrowheads?: Many university examples use plain lines. Replace every --> with --- in Mermaid for lines without arrowheads; nothing else changes.
Too many modules to fit in Word. What can I do?: This template runs left to right so modules stack vertically, and a dozen or more fit on one page. Beyond that, split the user side and admin side into two figures; Word export scales the image to the page width, so tiny text means it is time to split.

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Updated 2026-10-03