SARAHS SHORT CAKES SALES ORDER SYSTEM: you can easily find it on internet in PDF form:

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Case Reports: 2017 Vol: 23 Issue: 1

Case Study : Systems Analysis, Design and Development Case Study: Sarah's Short Cakes Sales Order System

Work Breakdown Structure: Use of a Gantt chart here is encouraged to illustrate a milestone / deliverable or short sprint (your choice). As a fallback, Excel may be used.

Use case diagrams:

A sequence or activity diagram:

A full database model along with narrative descriptions of the tables:

An interface model including a UI flow

Sample report and forms