ER Modeling

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Deliverable: Draw an Entity-Relationship Diagram

using ER-Assistant or equivalent software to capture data requirements

for Mama Mia’s Pizzeria. The deliverable is a complete ER model, and a

relational schema to document the data model for the following scenario.

We will discuss Relational Schema’s in Module 4.

– The ER diagram must include the necessary entity classes and all attributes specified in the description.

– Identifiers for all entity classes must be shown clearly.

– Relationships must be named, with cardinalities clearly shown.

– Write down your assumption clearly if necessary

– Do your best, if you are having troubles, please write that out with the assumptions.

There are multiple right answers for this problem, so please don’t
compare with others, as you can all read the definition differently.

RELATIONAL SCHEMA (a separate word or text document) to Canvas,
Assignment 1. At least one entity class name and attribute name should
start with your initials.

Case Description

Mia’s (MM) pizzeria offers pizzas, breadsticks, and Buffalo chicken
wings for carry out customers only. Customers phone in the order and
come by to pick up their order. When regular customers call MM over
phone, they are asked for their phone number. New customers must provide
this information before placing orders.

Once the order is taken,
the tax, and order total is computed. The order is then printed and
submitted to the kitchen where the order is prepared. A receipt is
printed and given to the customer. Payment from the customer should be
in check or cash only.

Customers may provide coupons. Coupon
information (discount applicable and validity period) must be provided
when placing the order and the coupon must be submitted when picking up
the order.

MM has a set of suppliers who supply the ingredients
for their products (pizza & breadsticks) such as flour for pizza
crust, cheese, a variety of toppings, chicken wings, spices, as well as
other ingredients for the pizza sauce.

MM would like to design a system that would serve the following purposes:

– Facilitate order acceptance and tracking

– Facilitate generation of daily, weekly, and monthly sales summaries

– Facilitate generation of products sold on a daily, weekly, and monthly basis.

-Facilitate tracking promotional sales (the ones with coupons).

maintain the inventory of ingredients so that they can identify which
supplier to call if they need a particular ingredient and to keep track
of the amount of each they have on hand and on order.

– To know
the customer preferences in terms of what the customer usually orders.
For example when a customer calls in and gives his/her phone number and
says “the usual”, MM knows exactly what to prepare! MM believes that
this will save customers a lot of frustration.

12 mins ago

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